diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Cells/XLCell.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Cells/XLCell.cs
index 7f86b52..63972fc 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Cells/XLCell.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Cells/XLCell.cs
@@ -70,15 +70,15 @@
         #region Constructor
 
         private Int32 _styleCacheId;
-        public XLCell(XLWorksheet worksheet, XLAddress address, IXLStyle defaultStyle)
+        public XLCell(XLWorksheet worksheet, XLAddress address, Int32 styleId)
         {
             Address = address;
             ShareString = true;
             
             _worksheet = worksheet;
 
-            SetStyle(defaultStyle ?? worksheet.Style);
-
+            //SetStyle(defaultStyle ?? worksheet.Style);
+            SetStyle(styleId);
         }
 
         private IXLStyle GetStyleForRead()
@@ -98,6 +98,12 @@
             _style = null;
             StyleChanged = false;
         }
+        private void SetStyle(Int32 styleId)
+        {
+            _styleCacheId = styleId;
+            _style = null;
+            StyleChanged = false;
+        }
 
         #endregion
 
@@ -733,8 +739,9 @@
 
             set
             {
-                _formulaA1 = value;
-                _formulaR1C1 = String.Empty;
+                _formulaA1 = StringExtensions.IsNullOrWhiteSpace(value) ? null : value;
+
+                _formulaR1C1 = null;
             }
         }
 
@@ -750,7 +757,7 @@
 
             set
             {
-                _formulaR1C1 = value;
+                _formulaR1C1 = StringExtensions.IsNullOrWhiteSpace(value) ? null : value;
 
 // FormulaA1 = GetFormulaA1(value);
             }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/XLColumn.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/XLColumn.cs
index 8ad0e34..5942db6 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/XLColumn.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/XLColumn.cs
@@ -31,7 +31,7 @@
                 Worksheet.RangeShiftedColumns += WorksheetRangeShiftedColumns;
             else
             {
-                SetStyle(xlColumnParameters.DefaultStyle ?? Worksheet.Style);
+                SetStyle(xlColumnParameters.DefaultStyleId);
                 _width = xlColumnParameters.Worksheet.ColumnWidth;
             }
         }
@@ -47,7 +47,7 @@
             _collapsed = column._collapsed;
             _isHidden = column._isHidden;
             _outlineLevel = column._outlineLevel;
-            SetStyle(column.Style ?? Worksheet.Style);
+            SetStyle(column.GetStyleId());
         }
 
         #endregion
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/XLColumnParameters.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/XLColumnParameters.cs
index 84053aa..4353f20 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/XLColumnParameters.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/XLColumnParameters.cs
@@ -5,13 +5,13 @@
 {
     internal class XLColumnParameters
     {
-        public XLColumnParameters(XLWorksheet worksheet, IXLStyle defaultStyle, Boolean isReference)
+        public XLColumnParameters(XLWorksheet worksheet, Int32 defaultStyleId, Boolean isReference)
         {
             Worksheet = worksheet;
-            DefaultStyle = defaultStyle;
+            DefaultStyleId = defaultStyleId;
             IsReference = isReference;
         }
-        public IXLStyle DefaultStyle { get; set; }
+        public Int32 DefaultStyleId { get; set; }
         public XLWorksheet Worksheet { get; private set; }
         public Boolean IsReference { get; private set; }
     }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRange.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRange.cs
index 97f4d48..80630a2 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRange.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRange.cs
@@ -907,7 +907,7 @@
                     var oldCell = rngToTranspose.Cell(ro, co);
                     var newKey = rngToTranspose.Cell(co, ro).Address;
                         // new XLAddress(Worksheet, c.Address.ColumnNumber, c.Address.RowNumber);
-                    var newCell = new XLCell(Worksheet, newKey, oldCell.Style);
+                    var newCell = new XLCell(Worksheet, newKey, oldCell.GetStyleId());
                     newCell.CopyFrom(oldCell);
                     cellsToInsert.Add(new XLSheetPoint(newKey.RowNumber, newKey.ColumnNumber), newCell);
                     cellsToDelete.Add(new XLSheetPoint(oldCell.Address.RowNumber, oldCell.Address.ColumnNumber));
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeBase.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeBase.cs
index fe050f2..74fd8ed 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeBase.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeBase.cs
@@ -21,6 +21,12 @@
             _style = null;
             StyleChanged = false;
         }
+        protected void SetStyle(Int32 styleId)
+        {
+            _styleCacheId = styleId;
+            _style = null;
+            StyleChanged = false;
+        }
         public Int32 GetStyleId()
         {
             if (StyleChanged)
@@ -533,19 +539,29 @@
             if (cell != null)
                 return cell;
 
-            var style = Style;
-            if (Style != null && Style.Equals(Worksheet.Style))
+            //var style = Style;
+            Int32 styleId = GetStyleId();
+            Int32 worksheetStyleId = Worksheet.GetStyleId();
+            
+            if (styleId == worksheetStyleId)
             {
-                if (Worksheet.Internals.RowsCollection.ContainsKey(absoluteAddress.RowNumber)
-                    && !Worksheet.Internals.RowsCollection[absoluteAddress.RowNumber].Style.Equals(Worksheet.Style))
-                    style = Worksheet.Internals.RowsCollection[absoluteAddress.RowNumber].Style;
-                else if (Worksheet.Internals.ColumnsCollection.ContainsKey(absoluteAddress.ColumnNumber)
-                         &&
-                         !Worksheet.Internals.ColumnsCollection[absoluteAddress.ColumnNumber].Style.Equals(
-                             Worksheet.Style))
-                    style = Worksheet.Internals.ColumnsCollection[absoluteAddress.ColumnNumber].Style;
+                XLRow row;
+                XLColumn column;
+                if (Worksheet.Internals.RowsCollection.TryGetValue(absoluteAddress.RowNumber, out row)
+                    && row.GetStyleId() == worksheetStyleId)
+                    styleId = row.GetStyleId();
+                else if (Worksheet.Internals.ColumnsCollection.TryGetValue(absoluteAddress.ColumnNumber, out column)
+                    && column.GetStyleId() == worksheetStyleId)
+                    styleId = column.GetStyleId();
+                //if (Worksheet.Internals.RowsCollection.ContainsKey(absoluteAddress.RowNumber)
+                //    && !Worksheet.Internals.RowsCollection[absoluteAddress.RowNumber].GetStyleId().Equals(worksheetStyleId))
+                //    style = Worksheet.Internals.RowsCollection[absoluteAddress.RowNumber].Style;
+                //else if (Worksheet.Internals.ColumnsCollection.ContainsKey(absoluteAddress.ColumnNumber)
+                //         &&
+                //         !Worksheet.Internals.ColumnsCollection[absoluteAddress.ColumnNumber].GetStyleId().Equals(worksheetStyleId))
+                //    style = Worksheet.Internals.ColumnsCollection[absoluteAddress.ColumnNumber].Style;
             }
-            var newCell = new XLCell(Worksheet, absoluteAddress, style);
+            var newCell = new XLCell(Worksheet, absoluteAddress, styleId);
             Worksheet.Internals.CellsCollection.Add(absoluteAddress.RowNumber, absoluteAddress.ColumnNumber, newCell);
             return newCell;
         }
@@ -780,7 +796,7 @@
                             var oldCell = Worksheet.Internals.CellsCollection.GetCell(ro, co) ??
                                           Worksheet.Cell(oldKey);
 
-                            var newCell = new XLCell(Worksheet, newKey, oldCell.Style);
+                            var newCell = new XLCell(Worksheet, newKey, oldCell.GetStyleId());
                             newCell.CopyValues(oldCell);
                             newCell.FormulaA1 = oldCell.FormulaA1;
                             cellsToInsert.Add(newKey, newCell);
@@ -800,7 +816,7 @@
                 {
                     int newColumn = c.Address.ColumnNumber + numberOfColumns;
                     var newKey = new XLAddress(Worksheet, c.Address.RowNumber, newColumn, false, false);
-                    var newCell = new XLCell(Worksheet, newKey, c.Style);
+                    var newCell = new XLCell(Worksheet, newKey, c.GetStyleId());
                     newCell.CopyValues(c);
                     newCell.FormulaA1 = c.FormulaA1;
                     cellsToInsert.Add(newKey, newCell);
@@ -963,7 +979,7 @@
                             var oldCell = Worksheet.Internals.CellsCollection.GetCell(ro, co) ??
                                           Worksheet.Cell(oldKey);
 
-                            var newCell = new XLCell(Worksheet, newKey, oldCell.Style);
+                            var newCell = new XLCell(Worksheet, newKey, oldCell.GetStyleId());
                             newCell.CopyFrom(oldCell);
                             newCell.FormulaA1 = oldCell.FormulaA1;
                             cellsToInsert.Add(newKey, newCell);
@@ -984,7 +1000,7 @@
                 {
                     int newRow = c.Address.RowNumber + numberOfRows;
                     var newKey = new XLAddress(Worksheet, newRow, c.Address.ColumnNumber, false, false);
-                    var newCell = new XLCell(Worksheet, newKey, c.Style);
+                    var newCell = new XLCell(Worksheet, newKey, c.GetStyleId());
                     newCell.CopyFrom(c);
                     newCell.FormulaA1 = c.FormulaA1;
                     cellsToInsert.Add(newKey, newCell);
@@ -1116,7 +1132,7 @@
                 var newKey = new XLAddress(Worksheet, c.Address.RowNumber - rowModifier,
                                            c.Address.ColumnNumber - columnModifier,
                                            false, false);
-                var newCell = new XLCell(Worksheet, newKey, c.Style);
+                var newCell = new XLCell(Worksheet, newKey, c.GetStyleId());
                 newCell.CopyValues(c);
                 newCell.FormulaA1 = c.FormulaA1;
                 cellsToDelete.Add(c.Address);
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Rows/XLRow.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Rows/XLRow.cs
index c6bd563..70fa176 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Rows/XLRow.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Rows/XLRow.cs
@@ -34,7 +34,7 @@
             else
             {
                 //_style = new XLStyle(this, xlRowParameters.DefaultStyle);
-                SetStyle(xlRowParameters.DefaultStyle ?? Worksheet.Style);
+                SetStyle(xlRowParameters.DefaultStyleId);
                 _height = xlRowParameters.Worksheet.RowHeight;
             }
         }
@@ -49,7 +49,7 @@
             _collapsed = row._collapsed;
             _isHidden = row._isHidden;
             _outlineLevel = row._outlineLevel;
-            SetStyle(row.Style ?? Worksheet.Style);
+            SetStyle(row.GetStyleId());
         }
 
         #endregion
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Rows/XLRowParameters.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Rows/XLRowParameters.cs
index 0b2d13e..99d1603 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Rows/XLRowParameters.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Rows/XLRowParameters.cs
@@ -5,14 +5,14 @@
 {
     internal class XLRowParameters
     {
-        public XLRowParameters(XLWorksheet worksheet, IXLStyle defaultStyle, Boolean isReference = true)
+        public XLRowParameters(XLWorksheet worksheet, Int32 defaultStyleId, Boolean isReference = true)
         {
             Worksheet = worksheet;
-            DefaultStyle = defaultStyle;
+            DefaultStyleId = defaultStyleId;
             IsReference = isReference;
         }
 
-        public IXLStyle DefaultStyle { get; set; }
+        public Int32 DefaultStyleId { get; set; }
         public XLWorksheet Worksheet { get; private set; }
         public Boolean IsReference { get; private set; }
     }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs
index 81abe5c..7e66a29 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs
@@ -2510,7 +2510,8 @@
             #region Columns
 
             if (xlWorksheet.Internals.CellsCollection.Count == 0 &&
-                xlWorksheet.Internals.ColumnsCollection.Count == 0)
+                xlWorksheet.Internals.ColumnsCollection.Count == 0
+                && xlWorksheet.Style.Equals(DefaultStyle))
                 worksheetPart.Worksheet.RemoveAllChildren<Columns>();
             else
             {
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorksheet.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorksheet.cs
index df3b8a9..9aae4f2 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorksheet.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorksheet.cs
@@ -80,7 +80,7 @@
 
         #endregion
 
-        private IXLStyle _style;
+        //private IXLStyle _style;
         public XLWorksheetInternals Internals { get; private set; }
 
         public override IEnumerable<IXLStyle> Styles
@@ -125,24 +125,24 @@
 
         public XLWorkbook Workbook { get; private set; }
 
-        private Int32 _styleCacheId;
-        public new Int32 GetStyleId()
-        {
-            if (StyleChanged)
-                SetStyle(Style);
+        //private Int32 _styleCacheId;
+        //public new Int32 GetStyleId()
+        //{
+        //    if (StyleChanged)
+        //        SetStyle(Style);
 
-            return _styleCacheId;
-        }
-        private new void SetStyle(IXLStyle styleToUse)
-        {
-            _styleCacheId = Worksheet.Workbook.GetStyleId(styleToUse);
-            _style = null;
-            StyleChanged = false;
-        }
-        private new IXLStyle GetStyle()
-        {
-            return _style ?? (_style = new XLStyle(this, Worksheet.Workbook.GetStyleById(_styleCacheId)));
-        }
+        //    return _styleCacheId;
+        //}
+        //private new void SetStyle(IXLStyle styleToUse)
+        //{
+        //    _styleCacheId = Worksheet.Workbook.GetStyleId(styleToUse);
+        //    _style = null;
+        //    StyleChanged = false;
+        //}
+        //private new IXLStyle GetStyle()
+        //{
+        //    return _style ?? (_style = new XLStyle(this, Worksheet.Workbook.GetStyleById(_styleCacheId)));
+        //}
 
         public override IXLStyle Style
         {
@@ -474,15 +474,16 @@
             if (column <= 0 || column > ExcelHelper.MaxColumnNumber)
                 throw new IndexOutOfRangeException(String.Format("Column number must be between 1 and {0}", ExcelHelper.MaxColumnNumber));
 
+            Int32 thisStyleId = GetStyleId();
             if (!Internals.ColumnsCollection.ContainsKey(column))
             {
                 // This is a new row so we're going to reference all 
                 // cells in this row to preserve their formatting
                 Internals.RowsCollection.Keys.ForEach(r => Cell(r, column));
-                Internals.ColumnsCollection.Add(column, new XLColumn(column, new XLColumnParameters(this, Style, false)));
+                Internals.ColumnsCollection.Add(column, new XLColumn(column, new XLColumnParameters(this, thisStyleId, false)));
             }
 
-            return new XLColumn(column, new XLColumnParameters(this, Style, true));
+            return new XLColumn(column, new XLColumnParameters(this, thisStyleId, true));
         }
 
         IXLColumn IXLWorksheet.Column(Int32 column)
@@ -1110,9 +1111,10 @@
             if(row <= 0 || row > ExcelHelper.MaxRowNumber)
                 throw  new IndexOutOfRangeException(String.Format("Row number must be between 1 and {0}", ExcelHelper.MaxRowNumber));
 
-            IXLStyle styleToUse;
-            if (Internals.RowsCollection.ContainsKey(row))
-                styleToUse = Internals.RowsCollection[row].Style;
+            Int32 styleId;
+            XLRow rowToUse;
+            if (Internals.RowsCollection.TryGetValue(row, out rowToUse))
+                styleId = rowToUse.GetStyleId();
             else
             {
                 if (pingCells)
@@ -1128,11 +1130,11 @@
 
                     usedColumns.ForEach(c => Cell(row, c));
                 }
-                styleToUse = Style;
-                Internals.RowsCollection.Add(row, new XLRow(row, new XLRowParameters(this, styleToUse, false)));
+                styleId = GetStyleId();
+                Internals.RowsCollection.Add(row, new XLRow(row, new XLRowParameters(this, styleId, false)));
             }
 
-            return new XLRow(row, new XLRowParameters(this, styleToUse));
+            return new XLRow(row, new XLRowParameters(this, styleId));
         }
 
         private IXLRange GetRangeForSort()
diff --git a/ClosedXML/ClosedXML/ClosedXML/Properties/AssemblyInfo.cs b/ClosedXML/ClosedXML/ClosedXML/Properties/AssemblyInfo.cs
index e5f5e2a..f3d1841 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Properties/AssemblyInfo.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Properties/AssemblyInfo.cs
@@ -31,6 +31,6 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("0.57.3.0")]
-[assembly: AssemblyFileVersion("0.57.3.0")]
+[assembly: AssemblyVersion("0.58.0.0")]
+[assembly: AssemblyFileVersion("0.58.0.0")]
 [assembly: System.Runtime.CompilerServices.InternalsVisibleTo("ClosedXML_Tests, PublicKey=0024000004800000940000000602000000240000525341310004000001000100a1fb8ba59167fe734d64128ca73d32c45cb8a117246d09c95c8769db88fe332b0a3396bedd0ea48ee42b0e5796fec0798ca5cb628a9a6de80d35d6c67b936ca1670347b3d4f2b769c8ce2ddcf959dbac6bcd88e6c08751ea1fffa0522de3507193e7035305a8aa008d6c88cca1341b3120fa9c347ab3f97e2d772e2709277da5")]
\ No newline at end of file
diff --git a/ClosedXML/ClosedXML/ClosedXML_Examples/ClosedXML_Examples.csproj b/ClosedXML/ClosedXML/ClosedXML_Examples/ClosedXML_Examples.csproj
index 1c8ef9c..4730c6c 100644
--- a/ClosedXML/ClosedXML/ClosedXML_Examples/ClosedXML_Examples.csproj
+++ b/ClosedXML/ClosedXML/ClosedXML_Examples/ClosedXML_Examples.csproj
@@ -197,6 +197,7 @@
     <Compile Include="Rows\InsertRows.cs" />
     <Compile Include="Rows\RowSettings.cs" />
     <Compile Include="StyleExamples.cs" />
+    <Compile Include="Styles\PurpleWorksheet.cs" />
     <Compile Include="Styles\UsingPhonetics.cs" />
     <Compile Include="Styles\UsingRichText.cs" />
     <Compile Include="Styles\UsingColors.cs" />
diff --git a/ClosedXML/ClosedXML/ClosedXML_Examples/Styles/PurpleWorksheet.cs b/ClosedXML/ClosedXML/ClosedXML_Examples/Styles/PurpleWorksheet.cs
new file mode 100644
index 0000000..fa4e674
--- /dev/null
+++ b/ClosedXML/ClosedXML/ClosedXML_Examples/Styles/PurpleWorksheet.cs
@@ -0,0 +1,19 @@
+using System;
+using ClosedXML.Excel;
+
+
+namespace ClosedXML_Examples.Styles
+{
+    public class PurpleWorksheet : IXLExample
+    {
+        public void Create(String filePath)
+        {
+            var workbook = new XLWorkbook();
+            var ws = workbook.Worksheets.Add("Purple Worksheet");
+
+            ws.Style.Fill.BackgroundColor = XLColor.Purple;
+            
+            workbook.SaveAs(filePath);
+        }
+    }
+}
\ No newline at end of file
diff --git a/ClosedXML/ClosedXML/ClosedXML_Net3.5/Properties/AssemblyInfo.cs b/ClosedXML/ClosedXML/ClosedXML_Net3.5/Properties/AssemblyInfo.cs
index 8f835bb..046f2c4 100644
--- a/ClosedXML/ClosedXML/ClosedXML_Net3.5/Properties/AssemblyInfo.cs
+++ b/ClosedXML/ClosedXML/ClosedXML_Net3.5/Properties/AssemblyInfo.cs
@@ -31,5 +31,5 @@
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("0.57.3.0")]
-[assembly: AssemblyFileVersion("0.57.3.0")]
+[assembly: AssemblyVersion("0.58.0.0")]
+[assembly: AssemblyFileVersion("0.58.0.0")]
diff --git a/ClosedXML/ClosedXML/ClosedXML_Tests/ClosedXML_Tests.csproj b/ClosedXML/ClosedXML/ClosedXML_Tests/ClosedXML_Tests.csproj
index dbeda88..951e44c 100644
--- a/ClosedXML/ClosedXML/ClosedXML_Tests/ClosedXML_Tests.csproj
+++ b/ClosedXML/ClosedXML/ClosedXML_Tests/ClosedXML_Tests.csproj
@@ -191,6 +191,7 @@
   <ItemGroup>
     <None Include="ClosedXML.snk" />
     <EmbeddedResource Include="Resource\Examples\Misc\BasicTable.xlsx" />
+    <EmbeddedResource Include="Resource\Examples\Styles\PurpleWorksheet.xlsx" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
diff --git a/ClosedXML/ClosedXML/ClosedXML_Tests/Examples/StylesTests.cs b/ClosedXML/ClosedXML/ClosedXML_Tests/Examples/StylesTests.cs
index 1aa9f0a..4d133d2 100644
--- a/ClosedXML/ClosedXML/ClosedXML_Tests/Examples/StylesTests.cs
+++ b/ClosedXML/ClosedXML/ClosedXML_Tests/Examples/StylesTests.cs
@@ -53,5 +53,10 @@
             TestHelper.RunTestExample<UsingRichText>(@"Styles\UsingRichText.xlsx");
         }
 
+         [TestMethod]
+         public void PurpleWorksheet()
+         {
+             TestHelper.RunTestExample<PurpleWorksheet>(@"Styles\PurpleWorksheet.xlsx");
+         }
     }
 }
\ No newline at end of file
diff --git a/ClosedXML/ClosedXML/ClosedXML_Tests/Resource/Examples/Columns/InsertColumns.xlsx b/ClosedXML/ClosedXML/ClosedXML_Tests/Resource/Examples/Columns/InsertColumns.xlsx
index 212395c..9bc87c1 100644
--- a/ClosedXML/ClosedXML/ClosedXML_Tests/Resource/Examples/Columns/InsertColumns.xlsx
+++ b/ClosedXML/ClosedXML/ClosedXML_Tests/Resource/Examples/Columns/InsertColumns.xlsx
Binary files differ
diff --git a/ClosedXML/ClosedXML/ClosedXML_Tests/Resource/Examples/Ranges/CurrentRowColumn.xlsx b/ClosedXML/ClosedXML/ClosedXML_Tests/Resource/Examples/Ranges/CurrentRowColumn.xlsx
index 8f391de..a988513 100644
--- a/ClosedXML/ClosedXML/ClosedXML_Tests/Resource/Examples/Ranges/CurrentRowColumn.xlsx
+++ b/ClosedXML/ClosedXML/ClosedXML_Tests/Resource/Examples/Ranges/CurrentRowColumn.xlsx
Binary files differ
diff --git a/ClosedXML/ClosedXML/ClosedXML_Tests/Resource/Examples/Rows/InsertRows.xlsx b/ClosedXML/ClosedXML/ClosedXML_Tests/Resource/Examples/Rows/InsertRows.xlsx
index 0b201d1..8e6ddc6 100644
--- a/ClosedXML/ClosedXML/ClosedXML_Tests/Resource/Examples/Rows/InsertRows.xlsx
+++ b/ClosedXML/ClosedXML/ClosedXML_Tests/Resource/Examples/Rows/InsertRows.xlsx
Binary files differ
diff --git a/ClosedXML/ClosedXML/ClosedXML_Tests/Resource/Examples/Styles/PurpleWorksheet.xlsx b/ClosedXML/ClosedXML/ClosedXML_Tests/Resource/Examples/Styles/PurpleWorksheet.xlsx
new file mode 100644
index 0000000..6118a3f
--- /dev/null
+++ b/ClosedXML/ClosedXML/ClosedXML_Tests/Resource/Examples/Styles/PurpleWorksheet.xlsx
Binary files differ