diff --git a/EPPlus/ConditionalFormatting/Contracts/IExcelConditionalFormattingDataBarGroup.cs b/EPPlus/ConditionalFormatting/Contracts/IExcelConditionalFormattingDataBarGroup.cs
index 99a44a1..91abb7d 100644
--- a/EPPlus/ConditionalFormatting/Contracts/IExcelConditionalFormattingDataBarGroup.cs
+++ b/EPPlus/ConditionalFormatting/Contracts/IExcelConditionalFormattingDataBarGroup.cs
@@ -29,8 +29,6 @@
  * Eyal Seagull    Conditional Formatting Adaption    2012-04-03
  *******************************************************************************/
 
-using System.Drawing;
-
 namespace OfficeOpenXml.ConditionalFormatting.Contracts;
 
 /// <summary>
@@ -51,9 +49,4 @@
   /// Databar High Value
   /// </summary>
   ExcelConditionalFormattingIconDataBarValue HighValue { get; }
-
-  /// <summary>
-  /// The color of the databar
-  /// </summary>
-  Color Color { get; set; }
 }
diff --git a/EPPlus/ConditionalFormatting/Contracts/IExcelConditionalFormattingIconSetGroup.cs b/EPPlus/ConditionalFormatting/Contracts/IExcelConditionalFormattingIconSetGroup.cs
index 700ffd6..770d75b 100644
--- a/EPPlus/ConditionalFormatting/Contracts/IExcelConditionalFormattingIconSetGroup.cs
+++ b/EPPlus/ConditionalFormatting/Contracts/IExcelConditionalFormattingIconSetGroup.cs
@@ -44,9 +44,4 @@
   /// ShowValue
   /// </summary>
   bool ShowValue { get; set; }
-
-  /// <summary>
-  /// IconSet (3, 4 ou 5 IconSet)
-  /// </summary>
-  T IconSet { get; set; }
 }
diff --git a/EPPlus/ConditionalFormatting/Contracts/IRangeConditionalFormatting.cs b/EPPlus/ConditionalFormatting/Contracts/IRangeConditionalFormatting.cs
index b2d99bf..bd84006 100644
--- a/EPPlus/ConditionalFormatting/Contracts/IRangeConditionalFormatting.cs
+++ b/EPPlus/ConditionalFormatting/Contracts/IRangeConditionalFormatting.cs
@@ -29,7 +29,6 @@
  * Eyal Seagull		    Conditional Formatting    2012-04-03
  *******************************************************************************/
 
-using System.Drawing;
 using OfficeOpenXml.ConditionalFormatting.Contracts;
 
 namespace OfficeOpenXml.ConditionalFormatting;
@@ -284,35 +283,4 @@
   /// </summary>
   /// <returns></returns>
   IExcelConditionalFormattingTwoColorScale AddTwoColorScale();
-
-  /// <summary>
-  /// Adds a <see cref="IExcelConditionalFormattingThreeIconSet&lt;eExcelconditionalFormatting3IconsSetType&gt;"/> to the range
-  /// </summary>
-  /// <param name="iconSet"></param>
-  /// <returns></returns>
-  IExcelConditionalFormattingThreeIconSet<eExcelconditionalFormatting3IconsSetType> AddThreeIconSet(
-      eExcelconditionalFormatting3IconsSetType iconSet);
-
-  /// <summary>
-  /// Adds a <see cref="IExcelConditionalFormattingFourIconSet&lt;eExcelconditionalFormatting4IconsSetType&gt;"/> to the range
-  /// </summary>
-  /// <param name="iconSet"></param>
-  /// <returns></returns>
-  IExcelConditionalFormattingFourIconSet<eExcelconditionalFormatting4IconsSetType> AddFourIconSet(
-      eExcelconditionalFormatting4IconsSetType iconSet);
-
-  /// <summary>
-  /// Adds a <see cref="IExcelConditionalFormattingFiveIconSet"/> to the range
-  /// </summary>
-  /// <param name="iconSet"></param>
-  /// <returns></returns>
-  IExcelConditionalFormattingFiveIconSet AddFiveIconSet(
-      eExcelconditionalFormatting5IconsSetType iconSet);
-
-  /// <summary>
-  /// Adds a <see cref="IExcelConditionalFormattingDataBarGroup"/> to the range
-  /// </summary>
-  /// <param name="color"></param>
-  /// <returns></returns>
-  IExcelConditionalFormattingDataBarGroup AddDatabar(Color color);
 }
diff --git a/EPPlus/ConditionalFormatting/ExcelConditionalFormattingCollection.cs b/EPPlus/ConditionalFormatting/ExcelConditionalFormattingCollection.cs
index 8d0ecf1..08605aa 100644
--- a/EPPlus/ConditionalFormatting/ExcelConditionalFormattingCollection.cs
+++ b/EPPlus/ConditionalFormatting/ExcelConditionalFormattingCollection.cs
@@ -29,10 +29,8 @@
  * Eyal Seagull		Conditional Formatting            2012-04-03
  *******************************************************************************/
 
-using System;
 using System.Collections;
 using System.Collections.Generic;
-using System.Drawing;
 using System.Xml;
 using OfficeOpenXml.ConditionalFormatting.Contracts;
 using OfficeOpenXml.Utils;
@@ -777,66 +775,4 @@
         eExcelConditionalFormattingRuleType.TwoColorScale,
         address);
   }
-
-  /// <summary>
-  /// Add ThreeIconSet Rule
-  /// </summary>
-  /// <param name="address">The address</param>
-  /// <param name="iconSet">Type of iconset</param>
-  /// <returns></returns>
-  public IExcelConditionalFormattingThreeIconSet<eExcelconditionalFormatting3IconsSetType> AddThreeIconSet(
-      ExcelAddress address,
-      eExcelconditionalFormatting3IconsSetType iconSet) {
-    var icon =
-        (IExcelConditionalFormattingThreeIconSet<eExcelconditionalFormatting3IconsSetType>)
-          AddRule(eExcelConditionalFormattingRuleType.ThreeIconSet, address);
-    icon.IconSet = iconSet;
-    return icon;
-  }
-
-  /// <summary>
-  /// Adds a FourIconSet rule
-  /// </summary>
-  /// <param name="address"></param>
-  /// <param name="iconSet"></param>
-  /// <returns></returns>
-  public IExcelConditionalFormattingFourIconSet<eExcelconditionalFormatting4IconsSetType> AddFourIconSet(
-      ExcelAddress address,
-      eExcelconditionalFormatting4IconsSetType iconSet) {
-    var icon =
-        (IExcelConditionalFormattingFourIconSet<eExcelconditionalFormatting4IconsSetType>)
-          AddRule(eExcelConditionalFormattingRuleType.FourIconSet, address);
-    icon.IconSet = iconSet;
-    return icon;
-  }
-
-  /// <summary>
-  /// Adds a FiveIconSet rule
-  /// </summary>
-  /// <param name="address"></param>
-  /// <param name="iconSet"></param>
-  /// <returns></returns>
-  public IExcelConditionalFormattingFiveIconSet AddFiveIconSet(
-      ExcelAddress address,
-      eExcelconditionalFormatting5IconsSetType iconSet) {
-    var icon = (IExcelConditionalFormattingFiveIconSet)AddRule(
-        eExcelConditionalFormattingRuleType.FiveIconSet,
-        address);
-    icon.IconSet = iconSet;
-    return icon;
-  }
-
-  /// <summary>
-  /// Adds a databar rule
-  /// </summary>
-  /// <param name="address"></param>
-  /// <param name="color"></param>
-  /// <returns></returns>
-  public IExcelConditionalFormattingDataBarGroup AddDatabar(ExcelAddress address, Color color) {
-    var dataBar = (IExcelConditionalFormattingDataBarGroup)AddRule(
-        eExcelConditionalFormattingRuleType.DataBar,
-        address);
-    dataBar.Color = color;
-    return dataBar;
-  }
 }
diff --git a/EPPlus/ConditionalFormatting/ExcelConditionalFormattingColorScaleValue.cs b/EPPlus/ConditionalFormatting/ExcelConditionalFormattingColorScaleValue.cs
index a8585f0..84d8fb1 100644
--- a/EPPlus/ConditionalFormatting/ExcelConditionalFormattingColorScaleValue.cs
+++ b/EPPlus/ConditionalFormatting/ExcelConditionalFormattingColorScaleValue.cs
@@ -30,7 +30,6 @@
  *******************************************************************************/
 
 using System;
-using System.Drawing;
 using System.Xml;
 using OfficeOpenXml.Utils;
 
@@ -63,7 +62,6 @@
   internal ExcelConditionalFormattingColorScaleValue(
       eExcelConditionalFormattingValueObjectPosition position,
       eExcelConditionalFormattingValueObjectType type,
-      Color color,
       double value,
       string formula,
       eExcelConditionalFormattingRuleType ruleType,
@@ -132,7 +130,6 @@
     Position = position;
     RuleType = ruleType;
     Type = type;
-    Color = color;
     Value = value;
     Formula = formula;
   }
@@ -153,7 +150,6 @@
   internal ExcelConditionalFormattingColorScaleValue(
       eExcelConditionalFormattingValueObjectPosition position,
       eExcelConditionalFormattingValueObjectType type,
-      Color color,
       double value,
       string formula,
       eExcelConditionalFormattingRuleType ruleType,
@@ -164,7 +160,6 @@
       : this(
           position,
           type,
-          color,
           value,
           formula,
           ruleType,
@@ -188,7 +183,6 @@
   internal ExcelConditionalFormattingColorScaleValue(
       eExcelConditionalFormattingValueObjectPosition position,
       eExcelConditionalFormattingValueObjectType type,
-      Color color,
       eExcelConditionalFormattingRuleType ruleType,
       ExcelAddress address,
       int priority,
@@ -197,7 +191,6 @@
       : this(
           position,
           type,
-          color,
           0,
           null,
           ruleType,
@@ -351,32 +344,6 @@
   }
 
   /// <summary>
-  ///
-  /// </summary>
-  public Color Color {
-    get {
-      // Color Code like "FF5B34F2"
-      var colorCode = GetXmlNodeString(
-          string.Format(
-              "{0}[position()={1}]/{2}",
-              // {0}
-              ExcelConditionalFormattingConstants.Paths._color,
-              // {1}
-              GetNodeOrder(),
-              // {2}
-              ExcelConditionalFormattingConstants.Paths._rgbAttribute));
-
-      return ExcelConditionalFormattingHelper.ConvertFromColorCode(colorCode);
-    }
-    set =>
-      // Use the color code to store (Ex. "FF5B35F2")
-      CreateNodeByOrdem(
-          eExcelConditionalFormattingValueObjectNodeType.Color,
-          ExcelConditionalFormattingConstants.Paths._rgbAttribute,
-          value.ToArgb().ToString("x"));
-  }
-
-  /// <summary>
   /// Get/Set the 'cfvo' node @val attribute
   /// </summary>
   public Double Value {
diff --git a/EPPlus/ConditionalFormatting/ExcelConditionalFormattingHelper.cs b/EPPlus/ConditionalFormatting/ExcelConditionalFormattingHelper.cs
index 0ea9a45..ba97c3d 100644
--- a/EPPlus/ConditionalFormatting/ExcelConditionalFormattingHelper.cs
+++ b/EPPlus/ConditionalFormatting/ExcelConditionalFormattingHelper.cs
@@ -30,7 +30,6 @@
  *******************************************************************************/
 
 using System;
-using System.Drawing;
 using System.Globalization;
 using System.Text.RegularExpressions;
 using System.Xml;
@@ -63,20 +62,6 @@
   }
 
   /// <summary>
-  /// Convert a color code to Color Object
-  /// </summary>
-  /// <param name="colorCode">Color Code (Ex. "#FFB43C53" or "FFB43C53")</param>
-  /// <returns></returns>
-  public static Color ConvertFromColorCode(string colorCode) {
-    try {
-      return Color.FromArgb(Int32.Parse(colorCode.Replace("#", ""), NumberStyles.HexNumber));
-    } catch {
-      // Assume white is the default color (instead of giving an error)
-      return Color.White;
-    }
-  }
-
-  /// <summary>
   ///
   /// </summary>
   /// <param name="node"></param>
diff --git a/EPPlus/ConditionalFormatting/RangeConditionalFormatting.cs b/EPPlus/ConditionalFormatting/RangeConditionalFormatting.cs
index debf061..6fcc305 100644
--- a/EPPlus/ConditionalFormatting/RangeConditionalFormatting.cs
+++ b/EPPlus/ConditionalFormatting/RangeConditionalFormatting.cs
@@ -29,7 +29,6 @@
  * Eyal Seagull       Conditional Formatting    2012-04-03
  *******************************************************************************/
 
-using System.Drawing;
 using OfficeOpenXml.ConditionalFormatting.Contracts;
 using OfficeOpenXml.Utils;
 
@@ -378,61 +377,4 @@
         eExcelConditionalFormattingRuleType.TwoColorScale,
         _address));
   }
-
-  /// <summary>
-  /// Adds a ThreeIconSet rule
-  /// </summary>
-  /// <param name="iconSet"></param>
-  /// <returns></returns>
-  public IExcelConditionalFormattingThreeIconSet<eExcelconditionalFormatting3IconsSetType> AddThreeIconSet(
-      eExcelconditionalFormatting3IconsSetType iconSet) {
-    var rule =
-        (IExcelConditionalFormattingThreeIconSet<eExcelconditionalFormatting3IconsSetType>)(_worksheet.ConditionalFormatting.AddRule(
-            eExcelConditionalFormattingRuleType.ThreeIconSet,
-            _address));
-    rule.IconSet = iconSet;
-    return rule;
-  }
-
-  /// <summary>
-  /// Adds a FourIconSet rule
-  /// </summary>
-  /// <param name="iconSet"></param>
-  /// <returns></returns>
-  public IExcelConditionalFormattingFourIconSet<eExcelconditionalFormatting4IconsSetType> AddFourIconSet(
-      eExcelconditionalFormatting4IconsSetType iconSet) {
-    var rule =
-        (IExcelConditionalFormattingFourIconSet<eExcelconditionalFormatting4IconsSetType>)(_worksheet.ConditionalFormatting.AddRule(
-            eExcelConditionalFormattingRuleType.FourIconSet,
-            _address));
-    rule.IconSet = iconSet;
-    return rule;
-  }
-
-  /// <summary>
-  /// Adds a FiveIconSet rule
-  /// </summary>
-  /// <param name="iconSet"></param>
-  /// <returns></returns>
-  public IExcelConditionalFormattingFiveIconSet AddFiveIconSet(
-      eExcelconditionalFormatting5IconsSetType iconSet) {
-    var rule = (IExcelConditionalFormattingFiveIconSet)(_worksheet.ConditionalFormatting.AddRule(
-        eExcelConditionalFormattingRuleType.FiveIconSet,
-        _address));
-    rule.IconSet = iconSet;
-    return rule;
-  }
-
-  /// <summary>
-  /// Adds a Databar rule
-  /// </summary>
-  /// <param name="color">The color of the databar</param>
-  /// <returns></returns>
-  public IExcelConditionalFormattingDataBarGroup AddDatabar(Color color) {
-    var rule = (IExcelConditionalFormattingDataBarGroup)(_worksheet.ConditionalFormatting.AddRule(
-        eExcelConditionalFormattingRuleType.DataBar,
-        _address));
-    rule.Color = color;
-    return rule;
-  }
 }
diff --git a/EPPlus/ConditionalFormatting/Rules/ExcelConditionalFormattingDataBar.cs b/EPPlus/ConditionalFormatting/Rules/ExcelConditionalFormattingDataBar.cs
index 2a80337..8ca4be2 100644
--- a/EPPlus/ConditionalFormatting/Rules/ExcelConditionalFormattingDataBar.cs
+++ b/EPPlus/ConditionalFormatting/Rules/ExcelConditionalFormattingDataBar.cs
@@ -29,7 +29,6 @@
  * Eyal Seagull        Added       		  2012-04-03
  *******************************************************************************/
 
-using System.Drawing;
 using System.Globalization;
 using System.Xml;
 using OfficeOpenXml.ConditionalFormatting.Contracts;
@@ -153,17 +152,4 @@
   public ExcelConditionalFormattingIconDataBarValue LowValue { get; internal set; }
 
   public ExcelConditionalFormattingIconDataBarValue HighValue { get; internal set; }
-
-  private const string _colorPath = "d:dataBar/d:color/@rgb";
-
-  public Color Color {
-    get {
-      var rgb = GetXmlNodeString(_colorPath);
-      if (!string.IsNullOrEmpty(rgb)) {
-        return Color.FromArgb(int.Parse(rgb, NumberStyles.HexNumber));
-      }
-      return Color.White;
-    }
-    set => SetXmlNodeString(_colorPath, value.ToArgb().ToString("X"));
-  }
 }
diff --git a/EPPlus/ConditionalFormatting/Rules/ExcelConditionalFormattingThreeColorScale.cs b/EPPlus/ConditionalFormatting/Rules/ExcelConditionalFormattingThreeColorScale.cs
index fa0574e..5700e10 100644
--- a/EPPlus/ConditionalFormatting/Rules/ExcelConditionalFormattingThreeColorScale.cs
+++ b/EPPlus/ConditionalFormatting/Rules/ExcelConditionalFormattingThreeColorScale.cs
@@ -71,7 +71,6 @@
     LowValue = new(
         eExcelConditionalFormattingValueObjectPosition.Low,
         eExcelConditionalFormattingValueObjectType.Min,
-        ColorTranslator.FromHtml(ExcelConditionalFormattingConstants.Colors._cfvoLowValue),
         eExcelConditionalFormattingRuleType.ThreeColorScale,
         address,
         priority,
@@ -82,7 +81,6 @@
     MiddleValue = new(
         eExcelConditionalFormattingValueObjectPosition.Middle,
         eExcelConditionalFormattingValueObjectType.Percent,
-        ColorTranslator.FromHtml(ExcelConditionalFormattingConstants.Colors._cfvoMiddleValue),
         50,
         string.Empty,
         eExcelConditionalFormattingRuleType.ThreeColorScale,
@@ -95,7 +93,6 @@
     HighValue = new(
         eExcelConditionalFormattingValueObjectPosition.High,
         eExcelConditionalFormattingValueObjectType.Max,
-        ColorTranslator.FromHtml(ExcelConditionalFormattingConstants.Colors._cfvoHighValue),
         eExcelConditionalFormattingRuleType.ThreeColorScale,
         address,
         priority,
diff --git a/EPPlus/ConditionalFormatting/Rules/ExcelConditionalFormattingThreeIconSet.cs b/EPPlus/ConditionalFormatting/Rules/ExcelConditionalFormattingThreeIconSet.cs
index 2b8b27e..bcf19e1 100644
--- a/EPPlus/ConditionalFormatting/Rules/ExcelConditionalFormattingThreeIconSet.cs
+++ b/EPPlus/ConditionalFormatting/Rules/ExcelConditionalFormattingThreeIconSet.cs
@@ -223,18 +223,6 @@
 
   private const string _iconSetPath = "d:iconSet/@iconSet";
 
-  /// <summary>
-  /// Type of iconset
-  /// </summary>
-  public T IconSet {
-    get {
-      var v = GetXmlNodeString(_iconSetPath);
-      v = v.Substring(1); //Skip first icon.
-      return (T)Enum.Parse(typeof(T), v, true);
-    }
-    set => SetXmlNodeString(_iconSetPath, GetIconSetString(value));
-  }
-
   private string GetIconSetString(T value) {
     if (Type == eExcelConditionalFormattingRuleType.FourIconSet) {
       switch (value.ToString()) {
diff --git a/EPPlus/ConditionalFormatting/Rules/ExcelConditionalFormattingTwoColorScale.cs b/EPPlus/ConditionalFormatting/Rules/ExcelConditionalFormattingTwoColorScale.cs
index 69ee8b1..ad7d79f 100644
--- a/EPPlus/ConditionalFormatting/Rules/ExcelConditionalFormattingTwoColorScale.cs
+++ b/EPPlus/ConditionalFormatting/Rules/ExcelConditionalFormattingTwoColorScale.cs
@@ -81,7 +81,6 @@
     LowValue = new(
         eExcelConditionalFormattingValueObjectPosition.Low,
         eExcelConditionalFormattingValueObjectType.Min,
-        ColorTranslator.FromHtml(ExcelConditionalFormattingConstants.Colors._cfvoLowValue),
         eExcelConditionalFormattingRuleType.TwoColorScale,
         address,
         priority,
@@ -92,7 +91,6 @@
     HighValue = new(
         eExcelConditionalFormattingValueObjectPosition.High,
         eExcelConditionalFormattingValueObjectType.Max,
-        ColorTranslator.FromHtml(ExcelConditionalFormattingConstants.Colors._cfvoHighValue),
         eExcelConditionalFormattingRuleType.TwoColorScale,
         address,
         priority,
diff --git a/EPPlus/DataValidation/Contracts/IExcelDataValidation.cs b/EPPlus/DataValidation/Contracts/IExcelDataValidation.cs
index 44b5d3e..7917008 100644
--- a/EPPlus/DataValidation/Contracts/IExcelDataValidation.cs
+++ b/EPPlus/DataValidation/Contracts/IExcelDataValidation.cs
@@ -49,7 +49,7 @@
   /// <summary>
   /// Controls how Excel will handle invalid values.
   /// </summary>
-  ExcelDataValidationWarningStyle ErrorStyle { get; set; }
+  ExcelDataValidationWarningStyle ErrorStyle { get; }
 
   /// <summary>
   /// True if input message should be shown
diff --git a/EPPlus/DataValidation/Contracts/IExcelDataValidationWithOperator.cs b/EPPlus/DataValidation/Contracts/IExcelDataValidationWithOperator.cs
index 48b06cb..2604079 100644
--- a/EPPlus/DataValidation/Contracts/IExcelDataValidationWithOperator.cs
+++ b/EPPlus/DataValidation/Contracts/IExcelDataValidationWithOperator.cs
@@ -39,5 +39,5 @@
   /// <summary>
   /// Operator type
   /// </summary>
-  ExcelDataValidationOperator Operator { get; set; }
+  ExcelDataValidationOperator Operator { get; }
 }
diff --git a/EPPlus/DataValidation/ExcelDataValidation.cs b/EPPlus/DataValidation/ExcelDataValidation.cs
index 78b6259..88a60de 100644
--- a/EPPlus/DataValidation/ExcelDataValidation.cs
+++ b/EPPlus/DataValidation/ExcelDataValidation.cs
@@ -199,18 +199,9 @@
   public ExcelDataValidationOperator Operator {
     get {
       var operatorString = GetXmlNodeString(_operatorPath);
-      if (!string.IsNullOrEmpty(operatorString)) {
-        return (ExcelDataValidationOperator)
-          Enum.Parse(typeof(ExcelDataValidationOperator), operatorString);
-      }
-      return default(ExcelDataValidationOperator);
-    }
-    set {
-      if (!ValidationType.AllowOperator) {
-        throw new InvalidOperationException(
-            "The current validation type does not allow operator to be set");
-      }
-      SetXmlNodeString(_operatorPath, value.ToString());
+      return Enum.TryParse<ExcelDataValidationOperator>(operatorString, true, out var op)
+          ? op
+          : ExcelDataValidationOperator.Any;
     }
   }
 
@@ -220,17 +211,9 @@
   public ExcelDataValidationWarningStyle ErrorStyle {
     get {
       var errorStyleString = GetXmlNodeString(_errorStylePath);
-      if (!string.IsNullOrEmpty(errorStyleString)) {
-        return (ExcelDataValidationWarningStyle)
-          Enum.Parse(typeof(ExcelDataValidationWarningStyle), errorStyleString);
-      }
-      return ExcelDataValidationWarningStyle.Undefined;
-    }
-    set {
-      if (value == ExcelDataValidationWarningStyle.Undefined) {
-        DeleteNode(_errorStylePath);
-      }
-      SetXmlNodeString(_errorStylePath, value.ToString());
+      return Enum.TryParse<ExcelDataValidationWarningStyle>(errorStyleString, true, out var style)
+          ? style
+          : ExcelDataValidationWarningStyle.Undefined;
     }
   }
 
diff --git a/EPPlus/DataValidation/ExcelDataValidationType.cs b/EPPlus/DataValidation/ExcelDataValidationType.cs
index 1c7465c..cdcc99c 100644
--- a/EPPlus/DataValidation/ExcelDataValidationType.cs
+++ b/EPPlus/DataValidation/ExcelDataValidationType.cs
@@ -116,34 +116,6 @@
   /// </summary>
   internal bool AllowOperator { get; private set; }
 
-  /// <summary>
-  /// Returns a validation type by <see cref="eDataValidationType"/>
-  /// </summary>
-  /// <param name="type"></param>
-  /// <returns></returns>
-  internal static ExcelDataValidationType GetByValidationType(eDataValidationType type) {
-    switch (type) {
-      case eDataValidationType.Any:
-        return Any;
-      case eDataValidationType.Whole:
-        return Whole;
-      case eDataValidationType.List:
-        return List;
-      case eDataValidationType.Decimal:
-        return Decimal;
-      case eDataValidationType.TextLength:
-        return TextLength;
-      case eDataValidationType.DateTime:
-        return DateTime;
-      case eDataValidationType.Time:
-        return Time;
-      case eDataValidationType.Custom:
-        return Custom;
-      default:
-        throw new InvalidOperationException("Non supported Validationtype : " + type);
-    }
-  }
-
   internal static ExcelDataValidationType GetBySchemaName(string schemaName) {
     switch (schemaName) {
       case DataValidationSchemaNames.Any:
diff --git a/EPPlus/Drawing/Vml/ExcelVmlDrawingComment.cs b/EPPlus/Drawing/Vml/ExcelVmlDrawingComment.cs
index 3392fc7..bd137cd 100644
--- a/EPPlus/Drawing/Vml/ExcelVmlDrawingComment.cs
+++ b/EPPlus/Drawing/Vml/ExcelVmlDrawingComment.cs
@@ -30,9 +30,6 @@
  * Jan Källman		License changed GPL-->LGPL 2011-12-16
  *******************************************************************************/
 
-using System;
-using System.Drawing;
-using System.Globalization;
 using System.Xml;
 
 namespace OfficeOpenXml.Drawing.Vml;
@@ -152,179 +149,6 @@
     }
   }
 
-  private const string _backgroundcolorPath = "@fillcolor";
-
-  /// <summary>
-  /// Background color
-  /// </summary>
-  public Color BackgroundColor {
-    get {
-      string col = GetXmlNodeString(_backgroundcolorPath);
-      if (col == "") {
-        return Color.FromArgb(0xff, 0xff, 0xe1);
-      }
-      if (col.StartsWith("#")) {
-        col = col.Substring(1, col.Length - 1);
-      }
-      if (int.TryParse(
-          col,
-          NumberStyles.AllowHexSpecifier,
-          CultureInfo.InvariantCulture,
-          out var res)) {
-        return Color.FromArgb(res);
-      }
-      return Color.Empty;
-    }
-    set {
-      string color = "#" + value.ToArgb().ToString("X").Substring(2, 6);
-      SetXmlNodeString(_backgroundcolorPath, color);
-      //SetXmlNode(BACKGROUNDCOLOR2_PATH, color);
-    }
-  }
-
-  private const string _linestylePath = "v:stroke/@dashstyle";
-  private const string _endcapPath = "v:stroke/@endcap";
-
-  /// <summary>
-  /// Linestyle for border
-  /// </summary>
-  public eLineStyleVml LineStyle {
-    get {
-      string v = GetXmlNodeString(_linestylePath);
-      if (v == "") {
-        return eLineStyleVml.Solid;
-      }
-      if (v == "1 1") {
-        v = GetXmlNodeString(_endcapPath);
-        return (eLineStyleVml)Enum.Parse(typeof(eLineStyleVml), v, true);
-      }
-      return (eLineStyleVml)Enum.Parse(typeof(eLineStyleVml), v, true);
-    }
-    set {
-      if (value == eLineStyleVml.Round || value == eLineStyleVml.Square) {
-        SetXmlNodeString(_linestylePath, "1 1");
-        if (value == eLineStyleVml.Round) {
-          SetXmlNodeString(_endcapPath, "round");
-        } else {
-          DeleteNode(_endcapPath);
-        }
-      } else {
-        string v = value.ToString();
-        v = v.Substring(0, 1).ToLower(CultureInfo.InvariantCulture) + v.Substring(1, v.Length - 1);
-        SetXmlNodeString(_linestylePath, v);
-        DeleteNode(_endcapPath);
-      }
-    }
-  }
-
-  private const string _linecolorPath = "@strokecolor";
-
-  /// <summary>
-  /// Line color
-  /// </summary>
-  public Color LineColor {
-    get {
-      string col = GetXmlNodeString(_linecolorPath);
-      if (col == "") {
-        return Color.Black;
-      }
-      if (col.StartsWith("#")) {
-        col = col.Substring(1, col.Length - 1);
-      }
-      if (int.TryParse(
-          col,
-          NumberStyles.AllowHexSpecifier,
-          CultureInfo.InvariantCulture,
-          out var res)) {
-        return Color.FromArgb(res);
-      }
-      return Color.Empty;
-    }
-    set {
-      string color = "#" + value.ToArgb().ToString("X").Substring(2, 6);
-      SetXmlNodeString(_linecolorPath, color);
-    }
-  }
-
-  private const string _linewidthPath = "@strokeweight";
-
-  /// <summary>
-  /// Width of the border
-  /// </summary>
-  public Single LineWidth {
-    get {
-      string wt = GetXmlNodeString(_linewidthPath);
-      if (wt == "") {
-        return (Single).75;
-      }
-      if (wt.EndsWith("pt")) {
-        wt = wt.Substring(0, wt.Length - 2);
-      }
-
-      if (Single.TryParse(wt, NumberStyles.Any, CultureInfo.InvariantCulture, out var ret)) {
-        return ret;
-      }
-      return 0;
-    }
-    set => SetXmlNodeString(_linewidthPath, value.ToString(CultureInfo.InvariantCulture) + "pt");
-  }
-
-  ///// <summary>
-  ///// Width of the Comment
-  ///// </summary>
-  //public Single Width
-  //{
-  //    get
-  //    {
-  //        string v;
-  //        GetStyle("width", out v);
-  //        if(v.EndsWith("pt"))
-  //        {
-  //            v = v.Substring(0, v.Length - 2);
-  //        }
-  //        short ret;
-  //        if (short.TryParse(v,System.Globalization.NumberStyles.Any, CultureInfo.InvariantCulture, out ret))
-  //        {
-  //            return ret;
-  //        }
-  //        else
-  //        {
-  //            return 0;
-  //        }
-  //    }
-  //    set
-  //    {
-  //        SetStyle("width", value.ToString("N2",CultureInfo.InvariantCulture) + "pt");
-  //    }
-  //}
-  ///// <summary>
-  ///// Height of the Comment
-  ///// </summary>
-  //public Single Height
-  //{
-  //    get
-  //    {
-  //        string v;
-  //        GetStyle("height", out v);
-  //        if (v.EndsWith("pt"))
-  //        {
-  //            v = v.Substring(0, v.Length - 2);
-  //        }
-  //        short ret;
-  //        if (short.TryParse(v, System.Globalization.NumberStyles.Any, CultureInfo.InvariantCulture, out ret))
-  //        {
-  //            return ret;
-  //        }
-  //        else
-  //        {
-  //            return 0;
-  //        }
-  //    }
-  //    set
-  //    {
-  //        SetStyle("height", value.ToString("N2", CultureInfo.InvariantCulture) + "pt");
-  //    }
-  //}
   private const string _textboxStylePath = "v:textbox/@style";
 
   /// <summary>
diff --git a/EPPlus/EPPlusSDK.csproj b/EPPlus/EPPlusSDK.csproj
index a26851d..2cdc079 100644
--- a/EPPlus/EPPlusSDK.csproj
+++ b/EPPlus/EPPlusSDK.csproj
@@ -4,9 +4,6 @@
     <RootNamespace>OfficeOpenXml</RootNamespace>
     <AssemblyName>EPPlus</AssemblyName>
     <PackageId>Appsheet.EPPlus</PackageId>
-    <Version>1.0.6</Version>
+    <Version>1.0.5</Version>
   </PropertyGroup>
-  <ItemGroup>
-    <PackageReference Include="System.Drawing.Common" Version="6.0.0"/>
-  </ItemGroup>
 </Project>
diff --git a/EPPlus/ExcelComment.cs b/EPPlus/ExcelComment.cs
index 9e7409a..3930bde 100644
--- a/EPPlus/ExcelComment.cs
+++ b/EPPlus/ExcelComment.cs
@@ -124,7 +124,6 @@
       }
       return _text;
     }
-    set => RichText.Text = value;
   }
 
   /// <summary>
diff --git a/EPPlus/ExcelCommentCollection.cs b/EPPlus/ExcelCommentCollection.cs
index b4a60af..9146df7 100644
--- a/EPPlus/ExcelCommentCollection.cs
+++ b/EPPlus/ExcelCommentCollection.cs
@@ -138,79 +138,9 @@
     }
   }
 
-  /// <summary>
-  /// Adds a comment to the top left cell of the range
-  /// </summary>
-  /// <param name="cell">The cell</param>
-  /// <param name="text">The comment text</param>
-  /// <param name="author">Author</param>
-  /// <returns>The comment</returns>
-  public ExcelComment Add(ExcelRangeBase cell, string text, string author) {
-    var elem = CommentXml.CreateElement("comment", ExcelPackage._schemaMain);
-    int ix = _comments.IndexOf(
-        ExcelCellBase.GetCellId(Worksheet.SheetID, cell._fromRow, cell._fromCol));
-    //Make sure the nodes come on order.
-    if (ix < 0 && (~ix < _comments.Count)) {
-      ix = ~ix;
-      var preComment = _comments[ix] as ExcelComment;
-      preComment._commentHelper.TopNode.ParentNode.InsertBefore(
-          elem,
-          preComment._commentHelper.TopNode);
-    } else {
-      CommentXml.SelectSingleNode("d:comments/d:commentList", NameSpaceManager).AppendChild(elem);
-    }
-    elem.SetAttribute("ref", cell.Start.Address);
-    ExcelComment comment = new ExcelComment(NameSpaceManager, elem, cell);
-    comment.RichText.Add(text);
-    if (author != "") {
-      comment.Author = author;
-    }
-    _comments.Add(comment);
-    //Check if a value exists otherwise add one so it is saved when the cells collection is iterated
-    if (!Worksheet._values.Exists(cell._fromRow, cell._fromCol)) {
-      Worksheet._values.SetValue(cell._fromRow, cell._fromCol, null);
-    }
-    return comment;
-  }
-
-  /// <summary>
-  /// Removes the comment
-  /// </summary>
-  /// <param name="comment">The comment to remove</param>
-  public void Remove(ExcelComment comment) {
-    ulong id = ExcelCellBase.GetCellId(
-        Worksheet.SheetID,
-        comment.Range._fromRow,
-        comment.Range._fromCol);
-    int ix = _comments.IndexOf(id);
-    if (ix >= 0 && comment == _comments[ix]) {
-      comment.TopNode.ParentNode.RemoveChild(comment.TopNode); //Remove VML
-      comment._commentHelper.TopNode.ParentNode.RemoveChild(comment._commentHelper.TopNode); //Remove Comment
-
-      Worksheet.VmlDrawingsComments._drawings.Delete(id);
-      _comments.Delete(id);
-    } else {
-      throw (new ArgumentException("Comment does not exist in the worksheet"));
-    }
-  }
-
   void IDisposable.Dispose() {}
 
-  /// <summary>
-  /// Removes the comment at the specified position
-  /// </summary>
-  /// <param name="index">The index</param>
-  public void RemoveAt(int index) {
-    Remove(this[index]);
-  }
-
   IEnumerator IEnumerable.GetEnumerator() {
     return _comments;
   }
-
-  internal void Clear() {
-    while (Count > 0) {
-      RemoveAt(0);
-    }
-  }
 }
diff --git a/EPPlus/ExcelPrinterSettings.cs b/EPPlus/ExcelPrinterSettings.cs
deleted file mode 100644
index dcdb541..0000000
--- a/EPPlus/ExcelPrinterSettings.cs
+++ /dev/null
@@ -1,773 +0,0 @@
-/*******************************************************************************
- * You may amend and distribute as you like, but don't remove this header!
- *
- * EPPlus provides server-side generation of Excel 2007/2010 spreadsheets.
- * See http://www.codeplex.com/EPPlus for details.
- *
- * Copyright (C) 2011  Jan Källman
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
-
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- * See the GNU Lesser General Public License for more details.
- *
- * The GNU Lesser General Public License can be viewed at http://www.opensource.org/licenses/lgpl-license.php
- * If you unfamiliar with this license or have questions about it, here is an http://www.gnu.org/licenses/gpl-faq.html
- *
- * All code and executables are provided "as is" with no warranty either express or implied.
- * The author accepts no liability for any damage or loss of business that this product may cause.
- *
- * Code change notes:
- *
- * Author							Change						Date
- * ******************************************************************************
- * Jan Källman		                Initial Release		        2009-10-01
- * Jan Källman		                License changed GPL-->LGPL 2011-12-27
- *******************************************************************************/
-
-using System;
-using System.Globalization;
-using System.Xml;
-
-namespace OfficeOpenXml;
-
-/// <summary>
-/// Printer orientation
-/// </summary>
-public enum eOrientation {
-  /// <summary>
-  /// Portrait orientation
-  /// </summary>
-  Portrait,
-
-  /// <summary>
-  /// Landscape orientation
-  /// </summary>
-  Landscape,
-}
-
-/// <summary>
-/// Papersize
-/// </summary>
-public enum ePaperSize {
-  /// <summary>
-  /// Letter paper (8.5 in. by 11 in.)
-  /// </summary>
-  Letter = 1,
-
-  /// <summary>
-  /// Letter small paper (8.5 in. by 11 in.)
-  /// </summary>
-  LetterSmall = 2,
-
-  /// <summary>
-  /// // Tabloid paper (11 in. by 17 in.)
-  /// </summary>
-  Tabloid = 3,
-
-  /// <summary>
-  /// Ledger paper (17 in. by 11 in.)
-  /// </summary>
-  Ledger = 4,
-
-  /// <summary>
-  /// Legal paper (8.5 in. by 14 in.)
-  /// </summary>
-  Legal = 5,
-
-  /// <summary>
-  /// Statement paper (5.5 in. by 8.5 in.)
-  /// </summary>
-  Statement = 6,
-
-  /// <summary>
-  /// Executive paper (7.25 in. by 10.5 in.)
-  /// </summary>
-  Executive = 7,
-
-  /// <summary>
-  /// A3 paper (297 mm by 420 mm)
-  /// </summary>
-  A3 = 8,
-
-  /// <summary>
-  /// A4 paper (210 mm by 297 mm)
-  /// </summary>
-  A4 = 9,
-
-  /// <summary>
-  /// A4 small paper (210 mm by 297 mm)
-  /// </summary>
-  A4Small = 10,
-
-  /// <summary>
-  /// A5 paper (148 mm by 210 mm)
-  /// </summary>
-  A5 = 11,
-
-  /// <summary>
-  /// B4 paper (250 mm by 353 mm)
-  /// </summary>
-  B4 = 12,
-
-  /// <summary>
-  /// B5 paper (176 mm by 250 mm)
-  /// </summary>
-  B5 = 13,
-
-  /// <summary>
-  /// Folio paper (8.5 in. by 13 in.)
-  /// </summary>
-  Folio = 14,
-
-  /// <summary>
-  /// Quarto paper (215 mm by 275 mm)
-  /// </summary>
-  Quarto = 15,
-
-  /// <summary>
-  /// Standard paper (10 in. by 14 in.)
-  /// </summary>
-  Standard1014 = 16,
-
-  /// <summary>
-  /// Standard paper (11 in. by 17 in.)
-  /// </summary>
-  Standard1117 = 17,
-
-  /// <summary>
-  /// Note paper (8.5 in. by 11 in.)
-  /// </summary>
-  Note = 18,
-
-  /// <summary>
-  /// #9 envelope (3.875 in. by 8.875 in.)
-  /// </summary>
-  Envelope9 = 19,
-
-  /// <summary>
-  /// #10 envelope (4.125 in. by 9.5 in.)
-  /// </summary>
-  Envelope10 = 20,
-
-  /// <summary>
-  /// #11 envelope (4.5 in. by 10.375 in.)
-  /// </summary>
-  Envelope11 = 21,
-
-  /// <summary>
-  /// #12 envelope (4.75 in. by 11 in.)
-  /// </summary>
-  Envelope12 = 22,
-
-  /// <summary>
-  /// #14 envelope (5 in. by 11.5 in.)
-  /// </summary>
-  Envelope14 = 23,
-
-  /// <summary>
-  /// C paper (17 in. by 22 in.)
-  /// </summary>
-  C = 24,
-
-  /// <summary>
-  /// D paper (22 in. by 34 in.)
-  /// </summary>
-  D = 25,
-
-  /// <summary>
-  /// E paper (34 in. by 44 in.)
-  /// </summary>
-  E = 26,
-
-  /// <summary>
-  /// DL envelope (110 mm by 220 mm)
-  /// </summary>
-  DlEnvelope = 27,
-
-  /// <summary>
-  /// C5 envelope (162 mm by 229 mm)
-  /// </summary>
-  C5Envelope = 28,
-
-  /// <summary>
-  /// C3 envelope (324 mm by 458 mm)
-  /// </summary>
-  C3Envelope = 29,
-
-  /// <summary>
-  /// C4 envelope (229 mm by 324 mm)
-  /// </summary>
-  C4Envelope = 30,
-
-  /// <summary>
-  /// C6 envelope (114 mm by 162 mm)
-  /// </summary>
-  C6Envelope = 31,
-
-  /// <summary>
-  /// C65 envelope (114 mm by 229 mm)
-  /// </summary>
-  C65Envelope = 32,
-
-  /// <summary>
-  /// B4 envelope (250 mm by 353 mm)
-  /// </summary>
-  B4Envelope = 33,
-
-  /// <summary>
-  /// B5 envelope (176 mm by 250 mm)
-  /// </summary>
-  B5Envelope = 34,
-
-  /// <summary>
-  /// B6 envelope (176 mm by 125 mm)
-  /// </summary>
-  B6Envelope = 35,
-
-  /// <summary>
-  /// Italy envelope (110 mm by 230 mm)
-  /// </summary>
-  ItalyEnvelope = 36,
-
-  /// <summary>
-  /// Monarch envelope (3.875 in. by 7.5 in.).
-  /// </summary>
-  MonarchEnvelope = 37,
-
-  /// <summary>
-  /// 6 3/4 envelope (3.625 in. by 6.5 in.)
-  /// </summary>
-  Six34Envelope = 38,
-
-  /// <summary>
-  /// US standard fanfold (14.875 in. by 11 in.)
-  /// </summary>
-  UsStandard = 39,
-
-  /// <summary>
-  /// German standard fanfold (8.5 in. by 12 in.)
-  /// </summary>
-  GermanStandard = 40,
-
-  /// <summary>
-  /// German legal fanfold (8.5 in. by 13 in.)
-  /// </summary>
-  GermanLegal = 41,
-
-  /// <summary>
-  /// ISO B4 (250 mm by 353 mm)
-  /// </summary>
-  Isob4 = 42,
-
-  /// <summary>
-  ///  Japanese double postcard (200 mm by 148 mm)
-  /// </summary>
-  JapaneseDoublePostcard = 43,
-
-  /// <summary>
-  /// Standard paper (9 in. by 11 in.)
-  /// </summary>
-  Standard9 = 44,
-
-  /// <summary>
-  /// Standard paper (10 in. by 11 in.)
-  /// </summary>
-  Standard10 = 45,
-
-  /// <summary>
-  /// Standard paper (15 in. by 11 in.)
-  /// </summary>
-  Standard15 = 46,
-
-  /// <summary>
-  /// Invite envelope (220 mm by 220 mm)
-  /// </summary>
-  InviteEnvelope = 47,
-
-  /// <summary>
-  /// Letter extra paper (9.275 in. by 12 in.)
-  /// </summary>
-  LetterExtra = 50,
-
-  /// <summary>
-  /// Legal extra paper (9.275 in. by 15 in.)
-  /// </summary>
-  LegalExtra = 51,
-
-  /// <summary>
-  /// Tabloid extra paper (11.69 in. by 18 in.)
-  /// </summary>
-  TabloidExtra = 52,
-
-  /// <summary>
-  /// A4 extra paper (236 mm by 322 mm)
-  /// </summary>
-  A4Extra = 53,
-
-  /// <summary>
-  /// Letter transverse paper (8.275 in. by 11 in.)
-  /// </summary>
-  LetterTransverse = 54,
-
-  /// <summary>
-  /// A4 transverse paper (210 mm by 297 mm)
-  /// </summary>
-  A4Transverse = 55,
-
-  /// <summary>
-  /// Letter extra transverse paper (9.275 in. by 12 in.)
-  /// </summary>
-  LetterExtraTransverse = 56,
-
-  /// <summary>
-  /// SuperA/SuperA/A4 paper (227 mm by 356 mm)
-  /// </summary>
-  SuperA = 57,
-
-  /// <summary>
-  /// SuperB/SuperB/A3 paper (305 mm by 487 mm)
-  /// </summary>
-  SuperB = 58,
-
-  /// <summary>
-  /// Letter plus paper (8.5 in. by 12.69 in.)
-  /// </summary>
-  LetterPlus = 59,
-
-  /// <summary>
-  /// A4 plus paper (210 mm by 330 mm)
-  /// </summary>
-  A4Plus = 60,
-
-  /// <summary>
-  /// A5 transverse paper (148 mm by 210 mm)
-  /// </summary>
-  A5Transverse = 61,
-
-  /// <summary>
-  /// JIS B5 transverse paper (182 mm by 257 mm)
-  /// </summary>
-  Jisb5Transverse = 62,
-
-  /// <summary>
-  /// A3 extra paper (322 mm by 445 mm)
-  /// </summary>
-  A3Extra = 63,
-
-  /// <summary>
-  /// A5 extra paper (174 mm by 235 mm)
-  /// </summary>
-  A5Extra = 64,
-
-  /// <summary>
-  /// ISO B5 extra paper (201 mm by 276 mm)
-  /// </summary>
-  Isob5 = 65,
-
-  /// <summary>
-  /// A2 paper (420 mm by 594 mm)
-  /// </summary>
-  A2 = 66,
-
-  /// <summary>
-  /// A3 transverse paper (297 mm by 420 mm)
-  /// </summary>
-  A3Transverse = 67,
-
-  /// <summary>
-  /// A3 extra transverse paper (322 mm by 445 mm*/
-  /// </summary>
-  A3ExtraTransverse = 68,
-}
-
-/// <summary>
-/// Specifies printed page order
-/// </summary>
-public enum ePageOrder {
-  /// <summary>
-  /// Order pages vertically first, then move horizontally.
-  /// </summary>
-  DownThenOver,
-
-  /// <summary>
-  /// Order pages horizontally first, then move vertically
-  /// </summary>
-  OverThenDown,
-}
-
-/// <summary>
-/// Printer settings
-/// </summary>
-public sealed class ExcelPrinterSettings : XmlHelper {
-  private readonly ExcelWorksheet _ws;
-  private bool _marginsCreated;
-
-  internal ExcelPrinterSettings(XmlNamespaceManager ns, XmlNode topNode, ExcelWorksheet ws)
-      : base(ns, topNode) {
-    _ws = ws;
-    SchemaNodeOrder = ws.SchemaNodeOrder;
-  }
-
-  private const string _leftMarginPath = "d:pageMargins/@left";
-
-  /// <summary>
-  /// Left margin in inches
-  /// </summary>
-  public decimal LeftMargin {
-    get => GetXmlNodeDecimal(_leftMarginPath);
-    set {
-      CreateMargins();
-      SetXmlNodeString(_leftMarginPath, value.ToString(CultureInfo.InvariantCulture));
-    }
-  }
-
-  private const string _rightMarginPath = "d:pageMargins/@right";
-
-  /// <summary>
-  /// Right margin in inches
-  /// </summary>
-  public decimal RightMargin {
-    get => GetXmlNodeDecimal(_rightMarginPath);
-    set {
-      CreateMargins();
-      SetXmlNodeString(_rightMarginPath, value.ToString(CultureInfo.InvariantCulture));
-    }
-  }
-
-  private const string _topMarginPath = "d:pageMargins/@top";
-
-  /// <summary>
-  /// Top margin in inches
-  /// </summary>
-  public decimal TopMargin {
-    get => GetXmlNodeDecimal(_topMarginPath);
-    set {
-      CreateMargins();
-      SetXmlNodeString(_topMarginPath, value.ToString(CultureInfo.InvariantCulture));
-    }
-  }
-
-  private const string _bottomMarginPath = "d:pageMargins/@bottom";
-
-  /// <summary>
-  /// Bottom margin in inches
-  /// </summary>
-  public decimal BottomMargin {
-    get => GetXmlNodeDecimal(_bottomMarginPath);
-    set {
-      CreateMargins();
-      SetXmlNodeString(_bottomMarginPath, value.ToString(CultureInfo.InvariantCulture));
-    }
-  }
-
-  private const string _headerMarginPath = "d:pageMargins/@header";
-
-  /// <summary>
-  /// Header margin in inches
-  /// </summary>
-  public decimal HeaderMargin {
-    get => GetXmlNodeDecimal(_headerMarginPath);
-    set {
-      CreateMargins();
-      SetXmlNodeString(_headerMarginPath, value.ToString(CultureInfo.InvariantCulture));
-    }
-  }
-
-  private const string _footerMarginPath = "d:pageMargins/@footer";
-
-  /// <summary>
-  /// Footer margin in inches
-  /// </summary>
-  public decimal FooterMargin {
-    get => GetXmlNodeDecimal(_footerMarginPath);
-    set {
-      CreateMargins();
-      SetXmlNodeString(_footerMarginPath, value.ToString(CultureInfo.InvariantCulture));
-    }
-  }
-
-  private const string _orientationPath = "d:pageSetup/@orientation";
-
-  /// <summary>
-  /// Orientation
-  /// Portrait or Landscape
-  /// </summary>
-  public eOrientation Orientation {
-    get => (eOrientation)Enum.Parse(typeof(eOrientation), GetXmlNodeString(_orientationPath), true);
-    set =>
-      SetXmlNodeString(_orientationPath, value.ToString().ToLower(CultureInfo.InvariantCulture));
-  }
-
-  private const string _fitToWidthPath = "d:pageSetup/@fitToWidth";
-
-  /// <summary>
-  /// Fit to Width in pages.
-  /// Set FitToPage to true when using this one.
-  /// 0 is automatic
-  /// </summary>
-  public int FitToWidth {
-    get => GetXmlNodeInt(_fitToWidthPath);
-    set => SetXmlNodeString(_fitToWidthPath, value.ToString());
-  }
-
-  private const string _fitToHeightPath = "d:pageSetup/@fitToHeight";
-
-  /// <summary>
-  /// Fit to height in pages.
-  /// Set FitToPage to true when using this one.
-  /// 0 is automatic
-  /// </summary>
-  public int FitToHeight {
-    get => GetXmlNodeInt(_fitToHeightPath);
-    set => SetXmlNodeString(_fitToHeightPath, value.ToString());
-  }
-
-  private const string _scalePath = "d:pageSetup/@scale";
-
-  /// <summary>
-  /// Print scale
-  /// </summary>
-  public int Scale {
-    get => GetXmlNodeInt(_scalePath);
-    set => SetXmlNodeString(_scalePath, value.ToString());
-  }
-
-  private const string _fitToPagePath = "d:sheetPr/d:pageSetUpPr/@fitToPage";
-
-  /// <summary>
-  /// Fit To Page.
-  /// </summary>
-  public bool FitToPage {
-    get => GetXmlNodeBool(_fitToPagePath);
-    set => SetXmlNodeString(_fitToPagePath, value ? "1" : "0");
-  }
-
-  private const string _headersPath = "d:printOptions/@headings";
-
-  /// <summary>
-  /// Print headings (column letter and row numbers)
-  /// </summary>
-  public bool ShowHeaders {
-    get => GetXmlNodeBool(_headersPath, false);
-    set => SetXmlNodeBool(_headersPath, value, false);
-  }
-
-  /// <summary>
-  /// Print titles
-  /// Rows to be repeated after each pagebreak.
-  /// The address must be a full row address (ex. 1:1)
-  /// </summary>
-  public ExcelAddress RepeatRows {
-    get {
-      if (_ws.Names.ContainsKey("_xlnm.Print_Titles")) {
-        ExcelRangeBase r = _ws.Names["_xlnm.Print_Titles"];
-        if (r.Start.Column == 1 && r.End.Column == ExcelPackage.MaxColumns) {
-          return new(r.FirstAddress);
-        }
-        if (r._addresses != null
-            && r.Addresses[0].Start.Column == 1
-            && r.Addresses[0].End.Column == ExcelPackage.MaxColumns) {
-          return r._addresses[0];
-        }
-        return null;
-      }
-      return null;
-    }
-    set {
-      //Must span entire columns
-      if (!(value.Start.Column == 1 && value.End.Column == ExcelPackage.MaxColumns)) {
-        throw new InvalidOperationException(
-            "Address must span full columns only (for ex. Address=\"A:A\" for the first column).");
-      }
-
-      var vertAddr = RepeatColumns;
-      string addr;
-      if (vertAddr == null) {
-        addr = value.Address;
-      } else {
-        addr = vertAddr.Address + "," + value.Address;
-      }
-
-      if (_ws.Names.ContainsKey("_xlnm.Print_Titles")) {
-        _ws.Names["_xlnm.Print_Titles"].Address = addr;
-      } else {
-        _ws.Names.Add("_xlnm.Print_Titles", new(_ws, addr));
-      }
-    }
-  }
-
-  /// <summary>
-  /// Print titles
-  /// Columns to be repeated after each pagebreak.
-  /// The address must be a full column address (ex. A:A)
-  /// </summary>
-  public ExcelAddress RepeatColumns {
-    get {
-      if (_ws.Names.ContainsKey("_xlnm.Print_Titles")) {
-        ExcelRangeBase r = _ws.Names["_xlnm.Print_Titles"];
-        if (r.Start.Row == 1 && r.End.Row == ExcelPackage.MaxRows) {
-          return new(r.FirstAddress);
-        }
-        if (r._addresses != null
-            && (r._addresses[0].Start.Row == 1
-                    && r._addresses[0].End.Row == ExcelPackage.MaxRows)) {
-          return r._addresses[0];
-        }
-        return null;
-      }
-      return null;
-    }
-    set {
-      //Must span entire rows
-      if (!(value.Start.Row == 1 && value.End.Row == ExcelPackage.MaxRows)) {
-        throw new InvalidOperationException(
-            "Address must span rows only (for ex. Address=\"1:1\" for the first row).");
-      }
-
-      var horAddr = RepeatRows;
-      string addr;
-      if (horAddr == null) {
-        addr = value.Address;
-      } else {
-        addr = value.Address + "," + horAddr.Address;
-      }
-
-      if (_ws.Names.ContainsKey("_xlnm.Print_Titles")) {
-        _ws.Names["_xlnm.Print_Titles"].Address = addr;
-      } else {
-        _ws.Names.Add("_xlnm.Print_Titles", new(_ws, addr));
-      }
-    }
-  }
-
-  /// <summary>
-  /// The printarea.
-  /// Null if no print area is set.
-  /// </summary>
-  public ExcelRangeBase PrintArea {
-    get {
-      if (_ws.Names.ContainsKey("_xlnm.Print_Area")) {
-        return _ws.Names["_xlnm.Print_Area"];
-      }
-      return null;
-    }
-    set {
-      if (value == null) {
-        _ws.Names.Remove("_xlnm.Print_Area");
-      } else if (_ws.Names.ContainsKey("_xlnm.Print_Area")) {
-        _ws.Names["_xlnm.Print_Area"].Address = value.Address;
-      } else {
-        _ws.Names.Add("_xlnm.Print_Area", value);
-      }
-    }
-  }
-
-  private const string _gridLinesPath = "d:printOptions/@gridLines";
-
-  /// <summary>
-  /// Print gridlines
-  /// </summary>
-  public bool ShowGridLines {
-    get => GetXmlNodeBool(_gridLinesPath, false);
-    set => SetXmlNodeBool(_gridLinesPath, value, false);
-  }
-
-  private const string _horizontalCenteredPath = "d:printOptions/@horizontalCentered";
-
-  /// <summary>
-  /// Horizontal centered when printing
-  /// </summary>w
-  public bool HorizontalCentered {
-    get => GetXmlNodeBool(_horizontalCenteredPath, false);
-    set => SetXmlNodeBool(_horizontalCenteredPath, value, false);
-  }
-
-  private const string _verticalCenteredPath = "d:printOptions/@verticalCentered";
-
-  /// <summary>
-  /// Vertical centered when printing
-  /// </summary>
-  public bool VerticalCentered {
-    get => GetXmlNodeBool(_verticalCenteredPath, false);
-    set => SetXmlNodeBool(_verticalCenteredPath, value, false);
-  }
-
-  private const string _pageOrderPath = "d:pageSetup/@pageOrder";
-
-  /// <summary>
-  /// Specifies printed page order
-  /// </summary>
-  public ePageOrder PageOrder {
-    get {
-      if (GetXmlNodeString(_pageOrderPath) == "overThenDown") {
-        return ePageOrder.OverThenDown;
-      }
-      return ePageOrder.DownThenOver;
-    }
-    set {
-      if (value == ePageOrder.OverThenDown) {
-        SetXmlNodeString(_pageOrderPath, "overThenDown");
-      } else {
-        DeleteNode(_pageOrderPath);
-      }
-    }
-  }
-
-  private const string _blackAndWhitePath = "d:pageSetup/@blackAndWhite";
-
-  /// <summary>
-  /// Print black and white
-  /// </summary>
-  public bool BlackAndWhite {
-    get => GetXmlNodeBool(_blackAndWhitePath, false);
-    set => SetXmlNodeBool(_blackAndWhitePath, value, false);
-  }
-
-  private const string _draftPath = "d:pageSetup/@draft";
-
-  /// <summary>
-  /// Print a draft
-  /// </summary>
-  public bool Draft {
-    get => GetXmlNodeBool(_draftPath, false);
-    set => SetXmlNodeBool(_draftPath, value, false);
-  }
-
-  private const string _paperSizePath = "d:pageSetup/@paperSize";
-
-  /// <summary>
-  /// Paper size
-  /// </summary>
-  public ePaperSize PaperSize {
-    get {
-      string s = GetXmlNodeString(_paperSizePath);
-      if (s != "") {
-        return (ePaperSize)int.Parse(s);
-      }
-      return ePaperSize.Letter;
-    }
-    set => SetXmlNodeString(_paperSizePath, ((int)value).ToString());
-  }
-
-  /// <summary>
-  /// All or none of the margin attributes must exist. Create all att ones.
-  /// </summary>
-  private void CreateMargins() {
-    if (_marginsCreated == false
-        && TopNode.SelectSingleNode(_leftMarginPath, NameSpaceManager) == null) {
-      _marginsCreated = true;
-      LeftMargin = 0.7087M;
-      RightMargin = 0.7087M;
-      TopMargin = 0.7480M;
-      BottomMargin = 0.7480M;
-      HeaderMargin = 0.315M;
-      FooterMargin = 0.315M;
-    }
-  }
-}
diff --git a/EPPlus/ExcelRangeBase.cs b/EPPlus/ExcelRangeBase.cs
index b4e48a8..686eb78 100644
--- a/EPPlus/ExcelRangeBase.cs
+++ b/EPPlus/ExcelRangeBase.cs
@@ -349,12 +349,6 @@
     }
   }
 
-  private void Set_Comment(object value, int row, int col) {
-    string[] v = (string[])value;
-    Worksheet.Comments.Add(new(_worksheet, GetAddress(_fromRow, _fromCol)), v[0], v[1]);
-    //   _worksheet.Cell(row, col).Comment = comment;
-  }
-
   private void SetToSelectedRange() {
     if (_worksheet.View.SelectedRange == "") {
       Address = "A1";
@@ -1837,339 +1831,6 @@
   }
 
   /// <summary>
-  /// Adds a new comment for the range.
-  /// If this range contains more than one cell, the top left comment is returned by the method.
-  /// </summary>
-  /// <param name="text"></param>
-  /// <param name="author"></param>
-  /// <returns>A reference comment of the top left cell</returns>
-  public ExcelComment AddComment(string text, string author) {
-    if (string.IsNullOrEmpty(author)) {
-      author = Thread.CurrentPrincipal.Identity.Name;
-    }
-    //Check if any comments exists in the range and throw an exception
-    _changePropMethod(Exists_Comment, null);
-    //Create the comments
-    _changePropMethod(Set_Comment, new[] { text, author });
-
-    return _worksheet.Comments[new ExcelCellAddress(_fromRow, _fromCol)];
-  }
-
-  ///// <summary>
-  ///// Copies the range of cells to an other range
-  ///// </summary>
-  ///// <param name="Destination">The start cell where the range will be copied.</param>
-  public void Copy(ExcelRangeBase destination) {
-    bool sameWorkbook = destination._worksheet.Workbook == _worksheet.Workbook;
-    ExcelStyles sourceStyles = _worksheet.Workbook.Styles,
-        styles = destination._worksheet.Workbook.Styles;
-    Dictionary<int, int> styleCashe = new Dictionary<int, int>();
-
-    //Clear all existing cells;
-    int toRow = _toRow - _fromRow + 1,
-        toCol = _toCol - _fromCol + 1;
-
-    string s = "";
-    int i = 0;
-    object o = null;
-    byte flag = 0;
-    Uri hl = null;
-    ExcelComment comment = null;
-
-    var cse = new CellsStoreEnumerator<object>(
-        _worksheet._values,
-        _fromRow,
-        _fromCol,
-        _toRow,
-        _toCol);
-    var copiedValue = new List<CopiedCell>();
-    while (cse.Next()) {
-      var row = cse.Row;
-      var col = cse.Column; //Issue 15070
-      var cell = new CopiedCell {
-        Row = destination._fromRow + (row - _fromRow),
-        Column = destination._fromCol + (col - _fromCol),
-        Value = cse.Value,
-      };
-
-      //Destination._worksheet._values.SetValue(row, col, cse.Value);
-
-      if (_worksheet._types.Exists(row, col, ref s)) {
-        //Destination._worksheet._types.SetValue(row, col,s);
-        cell.Type = s;
-      }
-
-      if (_worksheet._formulas.Exists(row, col, ref o)) {
-        if (o is int) {
-          // Destination._worksheet._formulas.SetValue(row, col, _worksheet.GetFormula(cse.Row, cse.Column));    //Shared formulas, set the formula per cell to simplify
-          cell.Formula = _worksheet.GetFormula(cse.Row, cse.Column);
-        } else {
-          //Destination._worksheet._formulas.SetValue(row, col, o);
-          cell.Formula = o;
-        }
-      }
-      if (_worksheet._styles.Exists(row, col, ref i)) {
-        if (sameWorkbook) {
-          //Destination._worksheet._styles.SetValue(row, col, i);
-          cell.StyleID = i;
-        } else {
-          if (styleCashe.ContainsKey(i)) {
-            i = styleCashe[i];
-          } else {
-            var oldStyleId = i;
-            i = styles.CloneStyle(sourceStyles, i);
-            styleCashe.Add(oldStyleId, i);
-          }
-          //Destination._worksheet._styles.SetValue(row, col, i);
-          cell.StyleID = i;
-        }
-      }
-
-      if (_worksheet._hyperLinks.Exists(row, col, ref hl)) {
-        //Destination._worksheet._hyperLinks.SetValue(row, col, hl);
-        cell.HyperLink = hl;
-      }
-
-      if (_worksheet._commentsStore.Exists(row, col, ref comment)) {
-        cell.Comment = comment;
-      }
-
-      if (_worksheet._flags.Exists(row, col, ref flag)) {
-        cell.Flag = flag;
-      }
-      copiedValue.Add(cell);
-    }
-
-    //Copy styles with no cell value
-    var cses = new CellsStoreEnumerator<int>(
-        _worksheet._styles,
-        _fromRow,
-        _fromCol,
-        _toRow,
-        _toCol);
-    while (cses.Next()) {
-      if (!_worksheet._values.Exists(cses.Row, cses.Column)) {
-        var row = destination._fromRow + (cses.Row - _fromRow);
-        var col = destination._fromCol + (cses.Column - _fromCol);
-        var cell = new CopiedCell {
-          Row = row,
-          Column = col,
-          Value = null,
-        };
-
-        i = cses.Value;
-        if (sameWorkbook) {
-          cell.StyleID = i;
-        } else {
-          if (styleCashe.ContainsKey(i)) {
-            i = styleCashe[i];
-          } else {
-            var oldStyleId = i;
-            i = styles.CloneStyle(sourceStyles, i);
-            styleCashe.Add(oldStyleId, i);
-          }
-          //Destination._worksheet._styles.SetValue(row, col, i);
-          cell.StyleID = i;
-        }
-        copiedValue.Add(cell);
-      }
-    }
-    var copiedMergedCells = new Dictionary<int, ExcelAddress>();
-    //Merged cells
-    var csem = new CellsStoreEnumerator<int>(
-        _worksheet.MergedCells._cells,
-        _fromRow,
-        _fromCol,
-        _toRow,
-        _toCol);
-    while (csem.Next()) {
-      if (!copiedMergedCells.ContainsKey(csem.Value)) {
-        var adr = new ExcelAddress(_worksheet.Name, _worksheet.MergedCells.List[csem.Value]);
-        if (Collide(adr) == eAddressCollition.Inside) {
-          copiedMergedCells.Add(
-              csem.Value,
-              new(
-                  destination._fromRow + (adr.Start.Row - _fromRow),
-                  destination._fromCol + (adr.Start.Column - _fromCol),
-                  destination._fromRow + (adr.End.Row - _fromRow),
-                  destination._fromCol + (adr.End.Column - _fromCol)));
-        } else {
-          //Partial merge of the address ignore.
-          copiedMergedCells.Add(csem.Value, null);
-        }
-      }
-    }
-
-    destination._worksheet.MergedCells.Clear(
-        new(
-            destination._fromRow,
-            destination._fromCol,
-            destination._fromRow + toRow - 1,
-            destination._fromCol + toCol - 1));
-
-    destination._worksheet._values.Clear(destination._fromRow, destination._fromCol, toRow, toCol);
-    destination._worksheet._formulas.Clear(
-        destination._fromRow,
-        destination._fromCol,
-        toRow,
-        toCol);
-    destination._worksheet._styles.Clear(destination._fromRow, destination._fromCol, toRow, toCol);
-    destination._worksheet._types.Clear(destination._fromRow, destination._fromCol, toRow, toCol);
-    destination._worksheet._hyperLinks.Clear(
-        destination._fromRow,
-        destination._fromCol,
-        toRow,
-        toCol);
-    destination._worksheet._flags.Clear(destination._fromRow, destination._fromCol, toRow, toCol);
-    destination._worksheet._commentsStore.Clear(
-        destination._fromRow,
-        destination._fromCol,
-        toRow,
-        toCol);
-
-    foreach (var cell in copiedValue) {
-      destination._worksheet._values.SetValue(cell.Row, cell.Column, cell.Value);
-
-      if (cell.Type != null) {
-        destination._worksheet._types.SetValue(cell.Row, cell.Column, cell.Type);
-      }
-
-      if (cell.StyleID != null) {
-        destination._worksheet._styles.SetValue(cell.Row, cell.Column, cell.StyleID.Value);
-      }
-
-      if (cell.Formula != null) {
-        cell.Formula = UpdateFormulaReferences(
-            cell.Formula.ToString(),
-            destination._fromRow - _fromRow,
-            destination._fromCol - _fromCol,
-            0,
-            0,
-            true);
-        destination._worksheet._formulas.SetValue(cell.Row, cell.Column, cell.Formula);
-      }
-      if (cell.HyperLink != null) {
-        destination._worksheet._hyperLinks.SetValue(cell.Row, cell.Column, cell.HyperLink);
-      }
-
-      if (cell.Comment != null) {
-        //Destination._worksheet._commentsStore.SetValue(cell.Row, cell.Column, cell.Comment);
-      }
-      if (cell.Flag != 0) {
-        destination._worksheet._flags.SetValue(cell.Row, cell.Column, cell.Flag);
-      }
-    }
-
-    //Add merged cells
-    foreach (var m in copiedMergedCells.Values) {
-      if (m != null) {
-        destination._worksheet.MergedCells.Add(m, true);
-      }
-    }
-
-    //Clone the cell
-    //var copiedCell = (_worksheet._cells[GetCellID(_worksheet.SheetID, cell._fromRow, cell.column)] as ExcelCell);
-
-    //var newCell = copiedCell.Clone(Destination._worksheet,
-    //        Destination._fromRow + (copiedCell.Row - _fromRow),
-    //        Destination.column + (copiedCell.Column - column));
-
-    //        newCell.MergeId = _worksheet.GetMergeCellId(copiedCell.Row, copiedCell.Column);
-
-    //        if (!string.IsNullOrEmpty(newCell.Formula))
-    //        {
-    //            newCell.Formula = ExcelCell.UpdateFormulaReferences(newCell.Formula, newCell.Row - copiedCell.Row, (newCell.Column - copiedCell.Column), 1, 1);
-    //        }
-
-    //        //If its not the same workbook we must copy the styles to the new workbook.
-    //        if (!sameWorkbook)
-    //        {
-    //            if (styleCashe.ContainsKey(cell.StyleID))
-    //            {
-    //                newCell.StyleID = styleCashe[cell.StyleID];
-    //            }
-    //            else
-    //            {
-    //                newCell.StyleID = styles.CloneStyle(sourceStyles, cell.StyleID);
-    //                styleCashe.Add(cell.StyleID, newCell.StyleID);
-    //            }
-    //        }
-    //        newCells.Add(newCell);
-    //        if (newCell.Merge) mergedCells.Add(newCell.CellID, newCell);
-    //    }
-
-    //    //Now clear the destination.
-    //    Destination.Offset(0, 0, (_toRow - _fromRow) + 1, (_toCol - column) + 1).Clear();
-
-    //    //And last add the new cells to the worksheet
-    //    foreach (var cell in newCells)
-    //    {
-    //        Destination.Worksheet._cells.Add(cell);
-    //    }
-    //    //Add merged cells
-    //    if (mergedCells.Count > 0)
-    //    {
-    //        List<ExcelAddressBase> mergedAddresses = new List<ExcelAddressBase>();
-    //        foreach (var cell in mergedCells.Values)
-    //        {
-    //            if (!IsAdded(cell, mergedAddresses))
-    //            {
-    //                int startRow = cell.Row, startCol = cell.Column, endRow = cell.Row, endCol = cell.Column + 1;
-    //                while (mergedCells.ContainsKey(ExcelCell.GetCellID(Destination.Worksheet.SheetID, endRow, endCol)))
-    //                {
-    //                    ExcelCell next = mergedCells[ExcelCell.GetCellID(Destination.Worksheet.SheetID, endRow, endCol)];
-    //                    if (cell.MergeId != next.MergeId)
-    //                    {
-    //                        break;
-    //                    }
-    //                    endCol++;
-    //                }
-
-    //                while (IsMerged(mergedCells, Destination.Worksheet, endRow, startCol, endCol - 1, cell))
-    //                {
-    //                    endRow++;
-    //                }
-
-    //                mergedAddresses.Add(new ExcelAddressBase(startRow, startCol, endRow - 1, endCol - 1));
-    //            }
-    //        }
-    //        Destination.Worksheet.MergedCells.List.AddRange((from r in mergedAddresses select r.Address));
-    //    }
-    //}
-
-    //private bool IsAdded(ExcelCell cell, List<ExcelAddressBase> mergedAddresses)
-    //{
-    //    foreach (var address in mergedAddresses)
-    //    {
-    //        if (address.Collide(new ExcelAddressBase(cell.CellAddress)) == eAddressCollition.Inside)
-    //        {
-    //            return true;
-    //        }
-    //    }
-    //    return false;
-    //}
-
-    //private bool IsMerged(Dictionary<ulong, ExcelCell> mergedCells, ExcelWorksheet worksheet, int row, int startCol, int endCol, ExcelCell cell)
-    //{
-    //    for (int col = startCol; col <= endCol; col++)
-    //    {
-    //        if (!mergedCells.ContainsKey(ExcelCell.GetCellID(worksheet.SheetID, row, col)))
-    //        {
-    //            return false;
-    //        }
-    //        else
-    //        {
-    //            ExcelCell next = mergedCells[ExcelCell.GetCellID(worksheet.SheetID, row, col)];
-    //            if (cell.MergeId != next.MergeId)
-    //            {
-    //                return false;
-    //            }
-    //        }
-    //    }
-    //    return true;
-  }
-
-  /// <summary>
   /// Clear all cells
   /// </summary>
   public void Clear() {
diff --git a/EPPlus/ExcelWorksheet.cs b/EPPlus/ExcelWorksheet.cs
index c561c33..33d2dd8 100644
--- a/EPPlus/ExcelWorksheet.cs
+++ b/EPPlus/ExcelWorksheet.cs
@@ -1514,17 +1514,6 @@
     }
   }
 
-  /// <summary>
-  /// Printer settings
-  /// </summary>
-  public ExcelPrinterSettings PrinterSettings {
-    get {
-      var ps = new ExcelPrinterSettings(NameSpaceManager, TopNode, this);
-      ps.SchemaNodeOrder = SchemaNodeOrder;
-      return ps;
-    }
-  }
-
   ///// <summary>
   ///// Provides access to an individual cell within the worksheet.
   ///// </summary>
diff --git a/EPPlus/FormulaParsing/ExpressionGraph/CompileResult.cs b/EPPlus/FormulaParsing/ExpressionGraph/CompileResult.cs
index 2545f6a..90693ee 100644
--- a/EPPlus/FormulaParsing/ExpressionGraph/CompileResult.cs
+++ b/EPPlus/FormulaParsing/ExpressionGraph/CompileResult.cs
@@ -107,9 +107,7 @@
         || DataType == DataType.Boolean
         || DataType == DataType.Date;
 
-  public bool IsNumericString {
-    get { return DataType == DataType.String && ConvertUtil.IsNumericString(Result); }
-  }
+  public bool IsNumericString => DataType == DataType.String && ConvertUtil.IsNumericString(Result);
 
   public bool IsResultOfSubtotal { get; set; }
 
diff --git a/EPPlus/RangeCollection.cs b/EPPlus/RangeCollection.cs
index 5dfb567..c7f8218 100644
--- a/EPPlus/RangeCollection.cs
+++ b/EPPlus/RangeCollection.cs
@@ -103,9 +103,7 @@
   /// <returns></returns>
   internal IRangeId this[int index] => _cells[_cellIndex[index].ListPointer];
 
-  internal int Count {
-    get { return _cells.Count; }
-  }
+  internal int Count => _cells.Count;
 
   internal void Add(IRangeId cell) {
     var ix = IndexOf(cell.RangeID);
diff --git a/EPPlus/Style/Dxf/DxfStyleBase.cs b/EPPlus/Style/Dxf/DxfStyleBase.cs
index 7bbbcd0..0c73cb0 100644
--- a/EPPlus/Style/Dxf/DxfStyleBase.cs
+++ b/EPPlus/Style/Dxf/DxfStyleBase.cs
@@ -21,8 +21,8 @@
 
   protected void SetValueColor(XmlHelper helper, string path, ExcelDxfColor color) {
     if (color != null && color.HasValue) {
-      if (color.Color != null) {
-        SetValue(helper, path + "/@rgb", color.Color.Value.ToArgb().ToString("x"));
+      if (color.Rgb != null) {
+        SetValue(helper, path + "/@rgb", color.Rgb);
       } else if (color.Auto != null) {
         SetValueBool(helper, path + "/@auto", color.Auto);
       } else if (color.Theme != null) {
@@ -68,7 +68,7 @@
     }
   }
 
-  protected internal string GetAsString(object v) {
+  protected string GetAsString(object v) {
     return (v ?? "").ToString();
   }
 
diff --git a/EPPlus/Style/Dxf/ExcelDxfColor.cs b/EPPlus/Style/Dxf/ExcelDxfColor.cs
index 4e6c4f9..d22a7f9 100644
--- a/EPPlus/Style/Dxf/ExcelDxfColor.cs
+++ b/EPPlus/Style/Dxf/ExcelDxfColor.cs
@@ -1,5 +1,4 @@
 using System;
-using System.Drawing;
 
 namespace OfficeOpenXml.Style.Dxf;
 
@@ -15,7 +14,7 @@
 
   public double? Tint { get; set; }
 
-  public Color? Color { get; set; }
+  public string Rgb { get; set; }
 
   protected internal override string Id =>
     GetAsString(Theme)
@@ -26,20 +25,20 @@
         + "|"
         + GetAsString(Tint)
         + "|"
-        + GetAsString(Color == null ? "" : Color.Value.ToArgb().ToString("x"));
+        + GetAsString(Rgb);
 
   protected internal override ExcelDxfColor Clone() {
     return new(_styles) {
       Theme = Theme,
       Index = Index,
-      Color = Color,
+      Rgb = Rgb,
       Auto = Auto,
       Tint = Tint,
     };
   }
 
   protected internal override bool HasValue =>
-    Theme != null || Index != null || Auto != null || Tint != null || Color != null;
+    Theme != null || Index != null || Auto != null || Tint != null || Rgb != null;
 
   protected internal override void CreateNodes(XmlHelper helper, string path) {
     throw new NotImplementedException();
diff --git a/EPPlus/Style/Dxf/ExcelDxfStyle.cs b/EPPlus/Style/Dxf/ExcelDxfStyle.cs
index 7180b21..325d5b1 100644
--- a/EPPlus/Style/Dxf/ExcelDxfStyle.cs
+++ b/EPPlus/Style/Dxf/ExcelDxfStyle.cs
@@ -1,5 +1,4 @@
 using System;
-using System.Drawing;
 using System.Globalization;
 using System.Xml;
 
@@ -53,46 +52,17 @@
     return bi;
   }
 
-  private ExcelBorderStyle GetBorderStyleEnum(string style) {
-    if (style == "") {
-      return ExcelBorderStyle.None;
-    }
-    string sInStyle =
-        style.Substring(0, 1).ToUpper(CultureInfo.InvariantCulture)
-            + style.Substring(1, style.Length - 1);
-    try {
-      return (ExcelBorderStyle)Enum.Parse(typeof(ExcelBorderStyle), sInStyle);
-    } catch {
-      return ExcelBorderStyle.None;
-    }
-  }
+  private ExcelBorderStyle GetBorderStyleEnum(string style) =>
+    Enum.TryParse<ExcelBorderStyle>(style, true, out var result) ? result : ExcelBorderStyle.None;
 
-  private ExcelFillStyle GetPatternTypeEnum(string patternType) {
-    if (patternType == "") {
-      return ExcelFillStyle.None;
-    }
-    patternType =
-        patternType.Substring(0, 1).ToUpper(CultureInfo.InvariantCulture)
-            + patternType.Substring(1, patternType.Length - 1);
-    try {
-      return (ExcelFillStyle)Enum.Parse(typeof(ExcelFillStyle), patternType);
-    } catch {
-      return ExcelFillStyle.None;
-    }
-  }
+  private ExcelFillStyle GetPatternTypeEnum(string patternType) =>
+    Enum.TryParse<ExcelFillStyle>(patternType, true, out var result) ? result : ExcelFillStyle.None;
 
   private ExcelDxfColor GetColor(XmlHelperInstance helper, string path) {
     ExcelDxfColor ret = new ExcelDxfColor(_styles);
     ret.Theme = helper.GetXmlNodeIntNull(path + "/@theme");
     ret.Index = helper.GetXmlNodeIntNull(path + "/@indexed");
-    string rgb = helper.GetXmlNodeString(path + "/@rgb");
-    if (rgb != "") {
-      ret.Color = Color.FromArgb(
-          int.Parse(rgb.Substring(0, 2), NumberStyles.AllowHexSpecifier),
-          int.Parse(rgb.Substring(2, 2), NumberStyles.AllowHexSpecifier),
-          int.Parse(rgb.Substring(4, 2), NumberStyles.AllowHexSpecifier),
-          int.Parse(rgb.Substring(6, 2), NumberStyles.AllowHexSpecifier));
-    }
+    ret.Rgb = helper.GetXmlNodeString(path + "/@rgb");
     ret.Auto = helper.GetXmlNodeBoolNullable(path + "/@auto");
     ret.Tint = helper.GetXmlNodeDoubleNull(path + "/@tint");
     return ret;
diff --git a/EPPlus/Style/ExcelBorder.cs b/EPPlus/Style/ExcelBorder.cs
index bf07432..55889fb 100644
--- a/EPPlus/Style/ExcelBorder.cs
+++ b/EPPlus/Style/ExcelBorder.cs
@@ -30,8 +30,6 @@
  * Jan Källman		License changed GPL-->LGPL 2011-12-16
  *******************************************************************************/
 
-using System.Drawing;
-
 namespace OfficeOpenXml.Style;
 
 /// <summary>
@@ -88,10 +86,6 @@
       }
       return false;
     }
-    set =>
-      _ChangedEvent(
-          this,
-          new(eStyleClass.Border, eStyleProperty.BorderDiagonalUp, value, _positionID, _address));
   }
 
   /// <summary>
@@ -104,99 +98,8 @@
       }
       return false;
     }
-    set =>
-      _ChangedEvent(
-          this,
-          new(eStyleClass.Border, eStyleProperty.BorderDiagonalDown, value, _positionID, _address));
   }
 
   internal override string Id =>
     Top.Id + Bottom.Id + Left.Id + Right.Id + Diagonal.Id + DiagonalUp + DiagonalDown;
-
-  /// <summary>
-  /// Set the border style around the range.
-  /// </summary>
-  /// <param name="style">The border style</param>
-  public void BorderAround(ExcelBorderStyle style) {
-    var addr = new ExcelAddress(_address);
-    SetBorderAroundStyle(style, addr);
-  }
-
-  /// <summary>
-  /// Set the border style around the range.
-  /// </summary>
-  /// <param name="style">The border style</param>
-  /// <param name="color">The color of the border</param>
-  public void BorderAround(ExcelBorderStyle style, Color color) {
-    var addr = new ExcelAddress(_address);
-    SetBorderAroundStyle(style, addr);
-
-    _ChangedEvent(
-        this,
-        new(
-            eStyleClass.BorderTop,
-            eStyleProperty.Color,
-            color.ToArgb().ToString("X"),
-            _positionID,
-            new ExcelAddress(addr._fromRow, addr._fromCol, addr._fromRow, addr._toCol).Address));
-    _ChangedEvent(
-        this,
-        new(
-            eStyleClass.BorderBottom,
-            eStyleProperty.Color,
-            color.ToArgb().ToString("X"),
-            _positionID,
-            new ExcelAddress(addr._toRow, addr._fromCol, addr._toRow, addr._toCol).Address));
-    _ChangedEvent(
-        this,
-        new(
-            eStyleClass.BorderLeft,
-            eStyleProperty.Color,
-            color.ToArgb().ToString("X"),
-            _positionID,
-            new ExcelAddress(addr._fromRow, addr._fromCol, addr._toRow, addr._fromCol).Address));
-    _ChangedEvent(
-        this,
-        new(
-            eStyleClass.BorderRight,
-            eStyleProperty.Color,
-            color.ToArgb().ToString("X"),
-            _positionID,
-            new ExcelAddress(addr._fromRow, addr._toCol, addr._toRow, addr._toCol).Address));
-  }
-
-  private void SetBorderAroundStyle(ExcelBorderStyle style, ExcelAddress addr) {
-    _ChangedEvent(
-        this,
-        new(
-            eStyleClass.BorderTop,
-            eStyleProperty.Style,
-            style,
-            _positionID,
-            new ExcelAddress(addr._fromRow, addr._fromCol, addr._fromRow, addr._toCol).Address));
-    _ChangedEvent(
-        this,
-        new(
-            eStyleClass.BorderBottom,
-            eStyleProperty.Style,
-            style,
-            _positionID,
-            new ExcelAddress(addr._toRow, addr._fromCol, addr._toRow, addr._toCol).Address));
-    _ChangedEvent(
-        this,
-        new(
-            eStyleClass.BorderLeft,
-            eStyleProperty.Style,
-            style,
-            _positionID,
-            new ExcelAddress(addr._fromRow, addr._fromCol, addr._toRow, addr._fromCol).Address));
-    _ChangedEvent(
-        this,
-        new(
-            eStyleClass.BorderRight,
-            eStyleProperty.Style,
-            style,
-            _positionID,
-            new ExcelAddress(addr._fromRow, addr._toCol, addr._toRow, addr._toCol).Address));
-  }
 }
diff --git a/EPPlus/Style/ExcelBorderItem.cs b/EPPlus/Style/ExcelBorderItem.cs
index 7708ab9..6f8208b 100644
--- a/EPPlus/Style/ExcelBorderItem.cs
+++ b/EPPlus/Style/ExcelBorderItem.cs
@@ -57,10 +57,7 @@
   /// <summary>
   /// The line style of the border
   /// </summary>
-  public ExcelBorderStyle Style {
-    get => GetSource().Style;
-    set => _ChangedEvent(this, new(_cls, eStyleProperty.Style, value, _positionID, _address));
-  }
+  public ExcelBorderStyle Style => GetSource().Style;
 
   private ExcelColor _color;
 
diff --git a/EPPlus/Style/ExcelColor.cs b/EPPlus/Style/ExcelColor.cs
index e673510..8725905 100644
--- a/EPPlus/Style/ExcelColor.cs
+++ b/EPPlus/Style/ExcelColor.cs
@@ -31,7 +31,6 @@
  *******************************************************************************/
 
 using System;
-using System.Drawing;
 using OfficeOpenXml.Style.XmlAccess;
 
 namespace OfficeOpenXml.Style;
@@ -63,41 +62,17 @@
   /// <summary>
   /// The tint value
   /// </summary>
-  public decimal Tint {
-    get => GetSource().Tint;
-    set {
-      if (value > 1 || value < -1) {
-        throw (new ArgumentOutOfRangeException("Value must be between -1 and 1"));
-      }
-      _ChangedEvent(this, new(_cls, eStyleProperty.Tint, value, _positionID, _address));
-    }
-  }
+  public decimal Tint => GetSource().Tint;
 
   /// <summary>
   /// The RGB value
   /// </summary>
-  public string Rgb {
-    get => GetSource().Rgb;
-    internal set =>
-      _ChangedEvent(this, new(_cls, eStyleProperty.Color, value, _positionID, _address));
-  }
+  public string Rgb => GetSource().Rgb;
 
   /// <summary>
   /// The indexed color number.
   /// </summary>
-  public int Indexed {
-    get => GetSource().Indexed;
-    set =>
-      _ChangedEvent(this, new(_cls, eStyleProperty.IndexedColor, value, _positionID, _address));
-  }
-
-  /// <summary>
-  /// Set the color of the object
-  /// </summary>
-  /// <param name="color">The color</param>
-  public void SetColor(Color color) {
-    Rgb = color.ToArgb().ToString("X");
-  }
+  public int Indexed => GetSource().Indexed;
 
   internal override string Id => Theme + Tint + Rgb + Indexed;
 
diff --git a/EPPlus/Style/ExcelFill.cs b/EPPlus/Style/ExcelFill.cs
index d1a5ea6..09193d7 100644
--- a/EPPlus/Style/ExcelFill.cs
+++ b/EPPlus/Style/ExcelFill.cs
@@ -56,14 +56,6 @@
       }
       return _styles.Fills[Index].PatternType;
     }
-    set {
-      if (_gradient != null) {
-        _gradient = null;
-      }
-      _ChangedEvent(
-          this,
-          new(eStyleClass.Fill, eStyleProperty.PatternType, value, _positionID, _address));
-    }
   }
 
   private ExcelColor _patternColor;
diff --git a/EPPlus/Style/ExcelFont.cs b/EPPlus/Style/ExcelFont.cs
index 36beb83..528c3c6 100644
--- a/EPPlus/Style/ExcelFont.cs
+++ b/EPPlus/Style/ExcelFont.cs
@@ -31,7 +31,6 @@
  *******************************************************************************/
 
 using System;
-using System.Drawing;
 
 namespace OfficeOpenXml.Style;
 
@@ -52,31 +51,17 @@
   /// <summary>
   /// The name of the font
   /// </summary>
-  public string Name {
-    get => _styles.Fonts[Index].Name;
-    set =>
-      _ChangedEvent(this, new(eStyleClass.Font, eStyleProperty.Name, value, _positionID, _address));
-  }
+  public string Name => _styles.Fonts[Index].Name;
 
   /// <summary>
   /// The Size of the font
   /// </summary>
-  public float Size {
-    get => _styles.Fonts[Index].Size;
-    set =>
-      _ChangedEvent(this, new(eStyleClass.Font, eStyleProperty.Size, value, _positionID, _address));
-  }
+  public float Size => _styles.Fonts[Index].Size;
 
   /// <summary>
   /// Font family
   /// </summary>
-  public int Family {
-    get => _styles.Fonts[Index].Family;
-    set =>
-      _ChangedEvent(
-          this,
-          new(eStyleClass.Font, eStyleProperty.Family, value, _positionID, _address));
-  }
+  public int Family => _styles.Fonts[Index].Family;
 
   /// <summary>
   /// Cell color
@@ -87,13 +72,7 @@
   /// <summary>
   /// Scheme
   /// </summary>
-  public string Scheme {
-    get => _styles.Fonts[Index].Scheme;
-    set =>
-      _ChangedEvent(
-          this,
-          new(eStyleClass.Font, eStyleProperty.Scheme, value, _positionID, _address));
-  }
+  public string Scheme => _styles.Fonts[Index].Scheme;
 
   /// <summary>
   /// Font-bold
@@ -107,78 +86,30 @@
   /// <summary>
   /// Font-italic
   /// </summary>
-  public bool Italic {
-    get => _styles.Fonts[Index].Italic;
-    set =>
-      _ChangedEvent(
-          this,
-          new(eStyleClass.Font, eStyleProperty.Italic, value, _positionID, _address));
-  }
+  public bool Italic => _styles.Fonts[Index].Italic;
 
   /// <summary>
   /// Font-Strikeout
   /// </summary>
-  public bool Strike {
-    get => _styles.Fonts[Index].Strike;
-    set =>
-      _ChangedEvent(
-          this,
-          new(eStyleClass.Font, eStyleProperty.Strike, value, _positionID, _address));
-  }
+  public bool Strike => _styles.Fonts[Index].Strike;
 
   /// <summary>
   /// Font-Underline
   /// </summary>
-  public bool UnderLine {
-    get => _styles.Fonts[Index].UnderLine;
-    set {
-      if (value) {
-        UnderLineType = ExcelUnderLineType.Single;
-      } else {
-        UnderLineType = ExcelUnderLineType.None;
-      }
-      //_ChangedEvent(this, new StyleChangeEventArgs(eStyleClass.Font, eStyleProperty.UnderlineType, value, _positionID, _address));
-    }
-  }
+  public bool UnderLine => _styles.Fonts[Index].UnderLine;
 
-  public ExcelUnderLineType UnderLineType {
-    get => _styles.Fonts[Index].UnderLineType;
-    set =>
-      _ChangedEvent(
-          this,
-          new(eStyleClass.Font, eStyleProperty.UnderlineType, value, _positionID, _address));
-  }
+  public ExcelUnderLineType UnderLineType => _styles.Fonts[Index].UnderLineType;
 
   /// <summary>
   /// Font-Vertical Align
   /// </summary>
-  public ExcelVerticalAlignmentFont VerticalAlign {
-    get {
-      if (_styles.Fonts[Index].VerticalAlign == "") {
-        return ExcelVerticalAlignmentFont.None;
-      }
-      return (ExcelVerticalAlignmentFont)
-        Enum.Parse(typeof(ExcelVerticalAlignmentFont), _styles.Fonts[Index].VerticalAlign, true);
-    }
-    set =>
-      _ChangedEvent(
-          this,
-          new(eStyleClass.Font, eStyleProperty.VerticalAlign, value, _positionID, _address));
-  }
-
-  /// <summary>
-  /// Set the font from a Font object
-  /// </summary>
-  /// <param name="font"></param>
-  public void SetFromFont(Font font) {
-    Name = font.Name;
-    //Family=fnt.FontFamily.;
-    Size = (int)font.Size;
-    Strike = font.Strikeout;
-    Bold = font.Bold;
-    UnderLine = font.Underline;
-    Italic = font.Italic;
-  }
+  public ExcelVerticalAlignmentFont VerticalAlign =>
+    Enum.TryParse<ExcelVerticalAlignmentFont>(
+        _styles.Fonts[Index].VerticalAlign,
+        true,
+        out var result)
+        ? result
+        : ExcelVerticalAlignmentFont.None;
 
   internal override string Id =>
     Name
diff --git a/EPPlus/Style/ExcelGradientFill.cs b/EPPlus/Style/ExcelGradientFill.cs
index 16e73c8..7103b37 100644
--- a/EPPlus/Style/ExcelGradientFill.cs
+++ b/EPPlus/Style/ExcelGradientFill.cs
@@ -52,99 +52,32 @@
   /// <summary>
   /// Angle of the linear gradient
   /// </summary>
-  public double Degree {
-    get => ((ExcelGradientFillXml)_styles.Fills[Index]).Degree;
-    set =>
-      _ChangedEvent(
-          this,
-          new(
-              eStyleClass.GradientFill,
-              eStyleProperty.GradientDegree,
-              value,
-              _positionID,
-              _address));
-  }
+  public double Degree => ((ExcelGradientFillXml)_styles.Fills[Index]).Degree;
 
   /// <summary>
   /// Linear or Path gradient
   /// </summary>
-  public ExcelFillGradientType Type {
-    get => ((ExcelGradientFillXml)_styles.Fills[Index]).Type;
-    set =>
-      _ChangedEvent(
-          this,
-          new(eStyleClass.GradientFill, eStyleProperty.GradientType, value, _positionID, _address));
-  }
+  public ExcelFillGradientType Type => ((ExcelGradientFillXml)_styles.Fills[Index]).Type;
 
   /// <summary>
   /// Specifies in percentage format(from the top to the bottom) the position of the top edge of the inner rectangle (color 1). For top, 0 means the top edge of the inner rectangle is on the top edge of the cell, and 1 means it is on the bottom edge of the cell. (applies to From Corner and From Center gradients).
   /// </summary>
-  public double Top {
-    get => ((ExcelGradientFillXml)_styles.Fills[Index]).Top;
-    set {
-      if (value < 0 | value > 1) {
-        throw (new ArgumentOutOfRangeException("Value must be between 0 and 1"));
-      }
-      _ChangedEvent(
-          this,
-          new(eStyleClass.GradientFill, eStyleProperty.GradientTop, value, _positionID, _address));
-    }
-  }
+  public double Top => ((ExcelGradientFillXml)_styles.Fills[Index]).Top;
 
   /// <summary>
   /// Specifies in percentage format (from the top to the bottom) the position of the bottom edge of the inner rectangle (color 1). For bottom, 0 means the bottom edge of the inner rectangle is on the top edge of the cell, and 1 means it is on the bottom edge of the cell.
   /// </summary>
-  public double Bottom {
-    get => ((ExcelGradientFillXml)_styles.Fills[Index]).Bottom;
-    set {
-      if (value < 0 | value > 1) {
-        throw (new ArgumentOutOfRangeException("Value must be between 0 and 1"));
-      }
-      _ChangedEvent(
-          this,
-          new(
-              eStyleClass.GradientFill,
-              eStyleProperty.GradientBottom,
-              value,
-              _positionID,
-              _address));
-    }
-  }
+  public double Bottom => ((ExcelGradientFillXml)_styles.Fills[Index]).Bottom;
 
   /// <summary>
   /// Specifies in percentage format (from the left to the right) the position of the left edge of the inner rectangle (color 1). For left, 0 means the left edge of the inner rectangle is on the left edge of the cell, and 1 means it is on the right edge of the cell. (applies to From Corner and From Center gradients).
   /// </summary>
-  public double Left {
-    get => ((ExcelGradientFillXml)_styles.Fills[Index]).Left;
-    set {
-      if (value < 0 | value > 1) {
-        throw (new ArgumentOutOfRangeException("Value must be between 0 and 1"));
-      }
-      _ChangedEvent(
-          this,
-          new(eStyleClass.GradientFill, eStyleProperty.GradientLeft, value, _positionID, _address));
-    }
-  }
+  public double Left => ((ExcelGradientFillXml)_styles.Fills[Index]).Left;
 
   /// <summary>
   /// Specifies in percentage format (from the left to the right) the position of the right edge of the inner rectangle (color 1). For right, 0 means the right edge of the inner rectangle is on the left edge of the cell, and 1 means it is on the right edge of the cell. (applies to From Corner and From Center gradients).
   /// </summary>
-  public double Right {
-    get => ((ExcelGradientFillXml)_styles.Fills[Index]).Right;
-    set {
-      if (value < 0 | value > 1) {
-        throw (new ArgumentOutOfRangeException("Value must be between 0 and 1"));
-      }
-      _ChangedEvent(
-          this,
-          new(
-              eStyleClass.GradientFill,
-              eStyleProperty.GradientRight,
-              value,
-              _positionID,
-              _address));
-    }
-  }
+  public double Right => ((ExcelGradientFillXml)_styles.Fills[Index]).Right;
 
   private ExcelColor _gradientColor1;
 
diff --git a/EPPlus/Style/ExcelNumberFormat.cs b/EPPlus/Style/ExcelNumberFormat.cs
index d1841df..32d88ac 100644
--- a/EPPlus/Style/ExcelNumberFormat.cs
+++ b/EPPlus/Style/ExcelNumberFormat.cs
@@ -51,10 +51,6 @@
   /// </summary>
   public int NumFmtID => Index;
 
-  //set
-  //{
-  //    _ChangedEvent(this, new StyleChangeEventArgs(eStyleClass.Numberformat, "NumFmtID", value, _workSheetID, _address));
-  //}
   /// <summary>
   /// The numberformat
   /// </summary>
diff --git a/EPPlus/Style/ExcelRichText.cs b/EPPlus/Style/ExcelRichText.cs
index 2207656..2458430 100644
--- a/EPPlus/Style/ExcelRichText.cs
+++ b/EPPlus/Style/ExcelRichText.cs
@@ -33,7 +33,6 @@
  *******************************************************************************/
 
 using System;
-using System.Drawing;
 using System.Globalization;
 using System.Xml;
 
@@ -216,33 +215,13 @@
   /// <summary>
   /// Vertical Alignment
   /// </summary>
-  public ExcelVerticalAlignmentFont VerticalAlign {
-    get {
-      string v = GetXmlNodeString(_vertAlignPath);
-      if (v == "") {
-        return ExcelVerticalAlignmentFont.None;
-      }
-      try {
-        return (ExcelVerticalAlignmentFont)Enum.Parse(typeof(ExcelVerticalAlignmentFont), v, true);
-      } catch {
-        return ExcelVerticalAlignmentFont.None;
-      }
-    }
-    set {
-      _collection.ConvertRichtext();
-      if (value == ExcelVerticalAlignmentFont.None) {
-        // If Excel 2010 encounters a vertical align value of blank, it will not load
-        // the spreadsheet. So if None is specified, delete the node, it will be
-        // recreated if a new value is applied later.
-        DeleteNode(_vertAlignPath);
-      } else {
-        SetXmlNodeString(_vertAlignPath, value.ToString().ToLowerInvariant());
-      }
-      if (_callback != null) {
-        _callback();
-      }
-    }
-  }
+  public ExcelVerticalAlignmentFont VerticalAlign =>
+    Enum.TryParse<ExcelVerticalAlignmentFont>(
+        GetXmlNodeString(TopNode, _vertAlignPath),
+        true,
+        out var result)
+        ? result
+        : ExcelVerticalAlignmentFont.None;
 
   private const string _sizePath = "d:rPr/d:sz/@val";
 
@@ -281,22 +260,11 @@
   /// <summary>
   /// Text color
   /// </summary>
-  public Color Color {
-    get {
-      string col = GetXmlNodeString(_colorPath);
-      if (col == "") {
-        return Color.Empty;
-      }
-      return Color.FromArgb(int.Parse(col, NumberStyles.AllowHexSpecifier));
-    }
+  public string Color {
+    get => GetXmlNodeString(_colorPath);
     set {
       _collection.ConvertRichtext();
-      SetXmlNodeString(
-          _colorPath,
-          value
-              .ToArgb()
-              .ToString(
-                  "X") /*.Substring(2, 6)*/);
+      SetXmlNodeString(_colorPath, value);
       if (_callback != null) {
         _callback();
       }
diff --git a/EPPlus/Style/ExcelRichTextCollection.cs b/EPPlus/Style/ExcelRichTextCollection.cs
index 5e87c4b..62925f7 100644
--- a/EPPlus/Style/ExcelRichTextCollection.cs
+++ b/EPPlus/Style/ExcelRichTextCollection.cs
@@ -32,7 +32,6 @@
 
 using System.Collections;
 using System.Collections.Generic;
-using System.Drawing;
 using System.Globalization;
 using System.Linq;
 using System.Text;
@@ -102,11 +101,7 @@
       ExcelRichText prevItem = _list[_list.Count - 1];
       rt.FontName = prevItem.FontName;
       rt.Size = prevItem.Size;
-      if (prevItem.Color.IsEmpty) {
-        rt.Color = Color.Black;
-      } else {
-        rt.Color = prevItem.Color;
-      }
+      rt.Color = prevItem.Color == "" ? "FF00000" : prevItem.Color;
       rt.PreserveSpace = rt.PreserveSpace;
       rt.Bold = prevItem.Bold;
       rt.Italic = prevItem.Italic;
@@ -160,11 +155,6 @@
       this[0].Italic = fnt.Italic;
       this[0].Size = fnt.Size;
       this[0].UnderLine = fnt.UnderLine;
-
-      if (fnt.Color.Rgb != ""
-          && int.TryParse(fnt.Color.Rgb, NumberStyles.HexNumber, null, out var hex)) {
-        this[0].Color = Color.FromArgb(hex);
-      }
     }
   }
 
@@ -173,18 +163,6 @@
   }
 
   /// <summary>
-  /// Clear the collection
-  /// </summary>
-  public void Clear() {
-    _list.Clear();
-    TopNode.RemoveAll();
-    UpdateCells();
-    if (_cells != null) {
-      _cells.IsRichText = false;
-    }
-  }
-
-  /// <summary>
   /// Removes an item at the specific index
   /// </summary>
   /// <param name="index"></param>
diff --git a/EPPlus/Style/ExcelRichTextHtmlUtility.cs b/EPPlus/Style/ExcelRichTextHtmlUtility.cs
deleted file mode 100644
index 83e37c6..0000000
--- a/EPPlus/Style/ExcelRichTextHtmlUtility.cs
+++ /dev/null
@@ -1,187 +0,0 @@
-﻿/*******************************************************************************
- * You may amend and distribute as you like, but don't remove this header!
- *
- * EPPlus provides server-side generation of Excel 2007/2010 spreadsheets.
- * See http://www.codeplex.com/EPPlus for details.
- *
- * Copyright (C) 2011  Jan Källman
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
-
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- * See the GNU Lesser General Public License for more details.
- *
- * The GNU Lesser General Public License can be viewed at http://www.opensource.org/licenses/lgpl-license.php
- * If you unfamiliar with this license or have questions about it, here is an http://www.gnu.org/licenses/gpl-faq.html
- *
- * All code and executables are provided "as is" with no warranty either express or implied.
- * The author accepts no liability for any damage or loss of business that this product may cause.
- *
- * Code change notes:
- *
- * Author				Change						Date
- * ******************************************************************************
- * Richard Tallent		Initial Release				2012-08-13
- *******************************************************************************/
-
-using System;
-using System.Text.RegularExpressions;
-using System.Web;
-
-namespace OfficeOpenXml.Style;
-
-public class ExcelRichTextHtmlUtility {
-  /// <summary>
-  /// Provides basic HTML support by converting well-behaved HTML into appropriate RichText blocks.
-  /// HTML support is limited, and does not include font colors, sizes, or typefaces at this time,
-  /// and also does not support CSS style attributes. It does support line breaks using the BR tag.
-  ///
-  /// This routine parses the HTML into RegEx pairings of an HTML tag and the text until the NEXT
-  /// tag (if any). The tag is parsed to determine the setting change to be applied to the last set
-  /// of settings, and if the text is not blank, a new block is added to rich text.
-  /// </summary>
-  /// <param name="range"></param>
-  /// <param name="html">The HTML to parse into RichText</param>
-  /// <param name="defaultFontName"></param>
-  /// <param name="defaultFontSize"></param>
-  public static void SetRichTextFromHtml(
-      ExcelRange range,
-      string html,
-      string defaultFontName,
-      short defaultFontSize) {
-    // Reset the cell value, just in case there is an existing RichText value.
-    range.Value = "";
-
-    // Sanity check for blank values, skips creating Regex objects for performance.
-    if (String.IsNullOrEmpty(html)) {
-      range.IsRichText = false;
-      return;
-    }
-
-    // Change all BR tags to line breaks. http://epplus.codeplex.com/discussions/238692/
-    // Cells with line breaks aren't necessarily considered rich text, so this is performed
-    // before parsing the HTML tags.
-    html = Regex.Replace(
-        html,
-        "<br[^>]*>",
-        "\r\n",
-        RegexOptions.Compiled | RegexOptions.IgnoreCase);
-
-    string tag;
-    string text;
-    ExcelRichText thisrt = null;
-    bool isFirst = true;
-
-    // Get all pairs of legitimate tags and the text between them. This loop will
-    // only execute if there is at least one start or end tag.
-    foreach (Match m in Regex.Matches(
-        html,
-        @"<(/?[a-z]+)[^<>]*>([\s\S]*?)(?=</?[a-z]+[^<>]*>|$)",
-        RegexOptions.Compiled | RegexOptions.IgnoreCase)) {
-      if (isFirst) {
-        // On the very first match, set up the initial rich text object with
-        // the defaults for the text BEFORE the match.
-        range.IsRichText = true;
-        thisrt = range.RichText.Add(CleanText(html.Substring(0, m.Index))); // May be 0-length
-        thisrt.Size = defaultFontSize; // Set the default font size
-        thisrt.FontName = defaultFontName; // Set the default font name
-        isFirst = false;
-      }
-      // Get the tag and the block of text until the NEXT tag or EOS. If there are HTML entities
-      // encoded, unencode them, they should be passed to RichText as normal characters (other
-      // than non-breaking spaces, which should be replaced with normal spaces, they break Excel.
-      tag = m.Groups[1].Captures[0].Value;
-      text = CleanText(m.Groups[2].Captures[0].Value);
-
-      if (thisrt.Text == "") {
-        // The most recent rich text block wasn't *actually* used last time around, so update
-        // the text and keep it as the "current" block. This happens with the first block if
-        // it starts with a tag, and may happen later if tags come one right after the other.
-        thisrt.Text = text;
-      } else {
-        // The current rich text block has some text, so create a new one. RichText.Add()
-        // automatically applies the settings from the previous block, other than vertical
-        // alignment.
-        thisrt = range.RichText.Add(text);
-      }
-      // Override the settings based on the current tag, keep all other settings.
-      SetStyleFromTag(tag, thisrt);
-    }
-
-    if (thisrt == null) {
-      // No HTML tags were found, so treat this as a normal text value.
-      range.IsRichText = false;
-      range.Value = CleanText(html);
-    } else if (String.IsNullOrEmpty(thisrt.Text)) {
-      // Rich text was found, but the last node contains no text, so remove it. This can happen if,
-      // say, the end of the string is an end tag or unsupported tag (common).
-      range.RichText.Remove(thisrt);
-
-      // Failsafe -- the HTML may be just tags, no text, in which case there may be no rich text
-      // directives that remain. If that is the case, turn off rich text and treat this like a blank
-      // cell value.
-      if (range.RichText.Count == 0) {
-        range.IsRichText = false;
-        range.Value = "";
-      }
-    }
-  }
-
-  private static void SetStyleFromTag(string tag, ExcelRichText settings) {
-    switch (tag.ToLower()) {
-      case "b":
-      case "strong":
-        settings.Bold = true;
-        break;
-      case "i":
-      case "em":
-        settings.Italic = true;
-        break;
-      case "u":
-        settings.UnderLine = true;
-        break;
-      case "s":
-      case "strike":
-        settings.Strike = true;
-        break;
-      case "sup":
-        settings.VerticalAlign = ExcelVerticalAlignmentFont.Superscript;
-        break;
-      case "sub":
-        settings.VerticalAlign = ExcelVerticalAlignmentFont.Subscript;
-        break;
-      case "/b":
-      case "/strong":
-        settings.Bold = false;
-        break;
-      case "/i":
-      case "/em":
-        settings.Italic = false;
-        break;
-      case "/u":
-        settings.UnderLine = false;
-        break;
-      case "/s":
-      case "/strike":
-        settings.Strike = false;
-        break;
-      case "/sup":
-      case "/sub":
-        settings.VerticalAlign = ExcelVerticalAlignmentFont.None;
-        break;
-    }
-  }
-
-  private static string CleanText(string s) {
-    // Need to convert HTML entities (named or numbered) into actual Unicode characters
-    s = HttpUtility.HtmlDecode(s);
-    // Remove any non-breaking spaces, kills Excel
-    s = s.Replace("\u00A0", " ");
-    return s;
-  }
-}
diff --git a/EPPlus/Style/ExcelStyle.cs b/EPPlus/Style/ExcelStyle.cs
index 9c2509a..3292c7b 100644
--- a/EPPlus/Style/ExcelStyle.cs
+++ b/EPPlus/Style/ExcelStyle.cs
@@ -84,24 +84,12 @@
   /// <summary>
   /// The horizontal alignment in the cell
   /// </summary>
-  public ExcelHorizontalAlignment HorizontalAlignment {
-    get => _styles.CellXfs[Index].HorizontalAlignment;
-    set =>
-      _ChangedEvent(
-          this,
-          new(eStyleClass.Style, eStyleProperty.HorizontalAlign, value, _positionID, _address));
-  }
+  public ExcelHorizontalAlignment HorizontalAlignment => _styles.CellXfs[Index].HorizontalAlignment;
 
   /// <summary>
   /// The vertical alignment in the cell
   /// </summary>
-  public ExcelVerticalAlignment VerticalAlignment {
-    get => _styles.CellXfs[Index].VerticalAlignment;
-    set =>
-      _ChangedEvent(
-          this,
-          new(eStyleClass.Style, eStyleProperty.VerticalAlign, value, _positionID, _address));
-  }
+  public ExcelVerticalAlignment VerticalAlignment => _styles.CellXfs[Index].VerticalAlignment;
 
   /// <summary>
   /// Wrap the text
@@ -117,89 +105,39 @@
   /// <summary>
   /// Readingorder
   /// </summary>
-  public ExcelReadingOrder ReadingOrder {
-    get => _styles.CellXfs[Index].ReadingOrder;
-    set =>
-      _ChangedEvent(
-          this,
-          new(eStyleClass.Style, eStyleProperty.ReadingOrder, value, _positionID, _address));
-  }
+  public ExcelReadingOrder ReadingOrder => _styles.CellXfs[Index].ReadingOrder;
 
   /// <summary>
   /// Shrink the text to fit
   /// </summary>
-  public bool ShrinkToFit {
-    get => _styles.CellXfs[Index].ShrinkToFit;
-    set =>
-      _ChangedEvent(
-          this,
-          new(eStyleClass.Style, eStyleProperty.ShrinkToFit, value, _positionID, _address));
-  }
+  public bool ShrinkToFit => _styles.CellXfs[Index].ShrinkToFit;
 
   /// <summary>
   /// The margin between the border and the text
   /// </summary>
-  public int Indent {
-    get => _styles.CellXfs[Index].Indent;
-    set {
-      if (value < 0 || value > 250) {
-        throw (new ArgumentOutOfRangeException("Indent must be between 0 and 250"));
-      }
-      _ChangedEvent(
-          this,
-          new(eStyleClass.Style, eStyleProperty.Indent, value, _positionID, _address));
-    }
-  }
+  public int Indent => _styles.CellXfs[Index].Indent;
 
   /// <summary>
   /// Text orientation in degrees. Values range from 0 to 180.
   /// </summary>
-  public int TextRotation {
-    get => _styles.CellXfs[Index].TextRotation;
-    set {
-      if (value < 0 || value > 180) {
-        throw new ArgumentOutOfRangeException("TextRotation out of range.");
-      }
-      _ChangedEvent(
-          this,
-          new(eStyleClass.Style, eStyleProperty.TextRotation, value, _positionID, _address));
-    }
-  }
+  public int TextRotation => _styles.CellXfs[Index].TextRotation;
 
   /// <summary>
   /// If true the cell is locked for editing when the sheet is protected
   /// <seealso cref="ExcelWorksheet.Protection"/>
   /// </summary>
-  public bool Locked {
-    get => _styles.CellXfs[Index].Locked;
-    set =>
-      _ChangedEvent(
-          this,
-          new(eStyleClass.Style, eStyleProperty.Locked, value, _positionID, _address));
-  }
+  public bool Locked => _styles.CellXfs[Index].Locked;
 
   /// <summary>
   /// If true the formula is hidden when the sheet is protected.
   /// <seealso cref="ExcelWorksheet.Protection"/>
   /// </summary>
-  public bool Hidden {
-    get => _styles.CellXfs[Index].Hidden;
-    set =>
-      _ChangedEvent(
-          this,
-          new(eStyleClass.Style, eStyleProperty.Hidden, value, _positionID, _address));
-  }
+  public bool Hidden => _styles.CellXfs[Index].Hidden;
 
   /// <summary>
   /// The index in the style collection
   /// </summary>
-  public int XfId {
-    get => _styles.CellXfs[Index].XfId;
-    set =>
-      _ChangedEvent(
-          this,
-          new(eStyleClass.Style, eStyleProperty.XfId, value, _positionID, _address));
-  }
+  public int XfId => _styles.CellXfs[Index].XfId;
 
   internal int PositionID { get; set; }
 
diff --git a/EPPlus/Style/ExcelTextFont.cs b/EPPlus/Style/ExcelTextFont.cs
index f098072..9252413 100644
--- a/EPPlus/Style/ExcelTextFont.cs
+++ b/EPPlus/Style/ExcelTextFont.cs
@@ -31,7 +31,6 @@
  *******************************************************************************/
 
 using System;
-using System.Drawing;
 using System.Globalization;
 using System.Xml;
 
@@ -141,22 +140,6 @@
     }
   }
 
-  private readonly string _underLineColorPath = "a:uFill/a:solidFill/a:srgbClr/@val";
-
-  public Color UnderLineColor {
-    get {
-      string col = GetXmlNodeString(_underLineColorPath);
-      if (col == "") {
-        return Color.Empty;
-      }
-      return Color.FromArgb(int.Parse(col, NumberStyles.AllowHexSpecifier));
-    }
-    set {
-      CreateTopNode();
-      SetXmlNodeString(_underLineColorPath, value.ToArgb().ToString("X").Substring(2, 6));
-    }
-  }
-
   private readonly string _italicPath = "@i";
 
   public bool Italic {
@@ -187,22 +170,6 @@
     }
   }
 
-  private readonly string _colorPath = "a:solidFill/a:srgbClr/@val";
-
-  public Color Color {
-    get {
-      string col = GetXmlNodeString(_colorPath);
-      if (col == "") {
-        return Color.Empty;
-      }
-      return Color.FromArgb(int.Parse(col, NumberStyles.AllowHexSpecifier));
-    }
-    set {
-      CreateTopNode();
-      SetXmlNodeString(_colorPath, value.ToArgb().ToString("X").Substring(2, 6));
-    }
-  }
-
   private eUnderLineType TranslateUnderline(string text) {
     switch (text) {
       case "sng":
@@ -212,7 +179,9 @@
       case "":
         return eUnderLineType.None;
       default:
-        return (eUnderLineType)Enum.Parse(typeof(eUnderLineType), text);
+        return Enum.TryParse<eUnderLineType>(text, true, out var result)
+            ? result
+            : eUnderLineType.None;
     }
   }
 
@@ -250,26 +219,4 @@
         return "noStrike";
     }
   }
-
-  /// <summary>
-  /// Set the font style from a font object
-  /// </summary>
-  /// <param name="font"></param>
-  public void SetFromFont(Font font) {
-    LatinFont = font.Name;
-    ComplexFont = font.Name;
-    Size = font.Size;
-    if (font.Bold) {
-      Bold = font.Bold;
-    }
-    if (font.Italic) {
-      Italic = font.Italic;
-    }
-    if (font.Underline) {
-      UnderLine = eUnderLineType.Single;
-    }
-    if (font.Strikeout) {
-      Strike = eStrikeType.Single;
-    }
-  }
 }
diff --git a/EPPlus/Style/StyleBase.cs b/EPPlus/Style/StyleBase.cs
index fa1b390..edc6650 100644
--- a/EPPlus/Style/StyleBase.cs
+++ b/EPPlus/Style/StyleBase.cs
@@ -1,4 +1,4 @@
-﻿/*******************************************************************************
+/*******************************************************************************
  * You may amend and distribute as you like, but don't remove this header!
  *
  * EPPlus provides server-side generation of Excel 2007/2010 spreadsheets.
diff --git a/EPPlus/Style/XmlAccess/ExcelBorderItemXml.cs b/EPPlus/Style/XmlAccess/ExcelBorderItemXml.cs
index 7e94481..9c0de5e 100644
--- a/EPPlus/Style/XmlAccess/ExcelBorderItemXml.cs
+++ b/EPPlus/Style/XmlAccess/ExcelBorderItemXml.cs
@@ -61,14 +61,9 @@
     if (style == "") {
       return ExcelBorderStyle.None;
     }
-    string sInStyle =
-        style.Substring(0, 1).ToUpper(CultureInfo.InvariantCulture)
-            + style.Substring(1, style.Length - 1);
-    try {
-      return (ExcelBorderStyle)Enum.Parse(typeof(ExcelBorderStyle), sInStyle);
-    } catch {
-      return ExcelBorderStyle.None;
-    }
+    return Enum.TryParse<ExcelBorderStyle>(style, true, out var result)
+        ? result
+        : ExcelBorderStyle.None;
   }
 
   private ExcelBorderStyle _borderStyle = ExcelBorderStyle.None;
diff --git a/EPPlus/Style/XmlAccess/ExcelColorXml.cs b/EPPlus/Style/XmlAccess/ExcelColorXml.cs
index ba1fd11..7a6d024 100644
--- a/EPPlus/Style/XmlAccess/ExcelColorXml.cs
+++ b/EPPlus/Style/XmlAccess/ExcelColorXml.cs
@@ -31,7 +31,6 @@
  *******************************************************************************/
 
 using System;
-using System.Drawing;
 using System.Globalization;
 using System.Xml;
 
@@ -142,11 +141,6 @@
     _auto = false;
   }
 
-  public void SetColor(Color color) {
-    Clear();
-    _rgb = color.ToArgb().ToString("X");
-  }
-
   internal ExcelColorXml Copy() {
     return new(NameSpaceManager) {
       _indexed = _indexed,
diff --git a/EPPlus/Style/XmlAccess/ExcelFillXml.cs b/EPPlus/Style/XmlAccess/ExcelFillXml.cs
index 98b7c9d..cf43d0e 100644
--- a/EPPlus/Style/XmlAccess/ExcelFillXml.cs
+++ b/EPPlus/Style/XmlAccess/ExcelFillXml.cs
@@ -55,17 +55,9 @@
   }
 
   private ExcelFillStyle GetPatternType(string patternType) {
-    if (patternType == "") {
-      return ExcelFillStyle.None;
-    }
-    patternType =
-        patternType.Substring(0, 1).ToUpper(CultureInfo.InvariantCulture)
-            + patternType.Substring(1, patternType.Length - 1);
-    try {
-      return (ExcelFillStyle)Enum.Parse(typeof(ExcelFillStyle), patternType);
-    } catch {
-      return ExcelFillStyle.None;
-    }
+    return Enum.TryParse<ExcelFillStyle>(patternType, true, out var result)
+        ? result
+        : ExcelFillStyle.None;
   }
 
   internal override string Id => PatternType + PatternColor.Id + BackgroundColor.Id;
diff --git a/EPPlus/Style/XmlAccess/ExcelFontXml.cs b/EPPlus/Style/XmlAccess/ExcelFontXml.cs
index 88ab554..2d90c95 100644
--- a/EPPlus/Style/XmlAccess/ExcelFontXml.cs
+++ b/EPPlus/Style/XmlAccess/ExcelFontXml.cs
@@ -31,7 +31,6 @@
  *******************************************************************************/
 
 using System;
-using System.Drawing;
 using System.Globalization;
 using System.Xml;
 
@@ -71,7 +70,9 @@
       if (ut == "") {
         _underlineType = ExcelUnderLineType.Single;
       } else {
-        _underlineType = (ExcelUnderLineType)Enum.Parse(typeof(ExcelUnderLineType), ut, true);
+        if (!Enum.TryParse(ut, true, out _underlineType)) {
+          _underlineType = ExcelUnderLineType.Single;
+        }
       }
     } else {
       _underlineType = ExcelUnderLineType.None;
@@ -222,16 +223,6 @@
     set => _verticalAlign = value;
   }
 
-  public void SetFromFont(Font font) {
-    Name = font.Name;
-    //Family=fnt.FontFamily.;
-    Size = (int)font.Size;
-    Strike = font.Strikeout;
-    Bold = font.Bold;
-    UnderLine = font.Underline;
-    Italic = font.Italic;
-  }
-
   internal ExcelFontXml Copy() {
     ExcelFontXml newFont = new ExcelFontXml(NameSpaceManager);
     newFont.Name = _name;
diff --git a/EPPlus/Style/XmlAccess/ExcelXfsXml.cs b/EPPlus/Style/XmlAccess/ExcelXfsXml.cs
index d00ed0e..45acdda 100644
--- a/EPPlus/Style/XmlAccess/ExcelXfsXml.cs
+++ b/EPPlus/Style/XmlAccess/ExcelXfsXml.cs
@@ -31,7 +31,6 @@
  *******************************************************************************/
 
 using System;
-using System.Drawing;
 using System.Globalization;
 using System.Xml;
 
@@ -82,45 +81,15 @@
     }
   }
 
-  private ExcelHorizontalAlignment GetHorizontalAlign(string align) {
-    if (align == "") {
-      return ExcelHorizontalAlignment.General;
-    }
-    align =
-        align.Substring(0, 1).ToUpper(CultureInfo.InvariantCulture)
-            + align.Substring(1, align.Length - 1);
-    try {
-      return (ExcelHorizontalAlignment)Enum.Parse(typeof(ExcelHorizontalAlignment), align);
-    } catch {
-      return ExcelHorizontalAlignment.General;
-    }
-  }
+  private ExcelHorizontalAlignment GetHorizontalAlign(string align) =>
+    Enum.TryParse<ExcelHorizontalAlignment>(align, true, out var result)
+        ? result
+        : ExcelHorizontalAlignment.General;
 
-  private ExcelVerticalAlignment GetVerticalAlign(string align) {
-    if (align == "") {
-      return ExcelVerticalAlignment.Bottom;
-    }
-    align =
-        align.Substring(0, 1).ToUpper(CultureInfo.InvariantCulture)
-            + align.Substring(1, align.Length - 1);
-    try {
-      return (ExcelVerticalAlignment)Enum.Parse(typeof(ExcelVerticalAlignment), align);
-    } catch {
-      return ExcelVerticalAlignment.Bottom;
-    }
-  }
-
-  internal void Xf_ChangedEvent(object sender, EventArgs e) {
-    //if (_cell != null)
-    //{
-    //    if (!Styles.ChangedCells.ContainsKey(_cell.Id))
-    //    {
-    //        //_cell.Style = "";
-    //        _cell.SetNewStyleID(int.MinValue.ToString());
-    //        Styles.ChangedCells.Add(_cell.Id, _cell);
-    //    }
-    //}
-  }
+  private ExcelVerticalAlignment GetVerticalAlign(string align) =>
+    Enum.TryParse<ExcelVerticalAlignment>(align, true, out var result)
+        ? result
+        : ExcelVerticalAlignment.Bottom;
 
   private int _xfID;
 
@@ -548,8 +517,8 @@
       fill = (ExcelGradientFillXml)Fill.Copy();
     } else {
       fill = new(Fill.NameSpaceManager);
-      fill.GradientColor1.SetColor(Color.White);
-      fill.GradientColor2.SetColor(Color.FromArgb(79, 129, 189));
+      fill.GradientColor1.Rgb = "FFFFFFFF";
+      fill.GradientColor2.Rgb = "FF4F81BD";
       fill.Type = ExcelFillGradientType.Linear;
       fill.Degree = 90;
       fill.Top = double.NaN;
diff --git a/NetCoreTests/ExcelPackageTest.cs b/NetCoreTests/ExcelPackageTest.cs
index 8785d5d..369e55a 100644
--- a/NetCoreTests/ExcelPackageTest.cs
+++ b/NetCoreTests/ExcelPackageTest.cs
@@ -3,6 +3,7 @@
 using FluentAssertions;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
 using OfficeOpenXml;
+using OfficeOpenXml.DataValidation;
 
 namespace NetCoreTests;
 
@@ -32,6 +33,20 @@
     worksheet.Name.Should().Be("pusum11a");
   }
 
+  [TestMethod]
+  public void TestGetAsByteArray_DataValidation() {
+    var package = new ExcelPackage(new FileInfo(GetTestWorkbookPath("DataValidation.xlsx")));
+    var data = package.GetAsByteArray();
+
+    // Verify that we can reload
+    var newPackage = new ExcelPackage(new MemoryStream(data, false));
+    newPackage.Workbook.Worksheets.Count.Should().Be(1);
+    var worksheet = newPackage.Workbook.Worksheets.First();
+    worksheet.Name.Should().Be("Sheet1");
+    worksheet.DataValidations.Should().HaveCount(31);
+    worksheet.DataValidations[1].ValidationType.Should().Be(ExcelDataValidationType.Whole);
+  }
+
   private static string GetTestWorkbookPath(string filename) {
     var assemblyPath = Path.GetDirectoryName(typeof(ExcelPackageTest).Assembly.Location)!;
     return Path.Combine(assemblyPath, "TestWorkbooks", filename);
diff --git a/NetCoreTests/TestWorkbooks/DataValidation.xlsx b/NetCoreTests/TestWorkbooks/DataValidation.xlsx
new file mode 100644
index 0000000..78d508c
--- /dev/null
+++ b/NetCoreTests/TestWorkbooks/DataValidation.xlsx
Binary files differ