diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs
index 8fc4fe0..defbe68 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs
@@ -593,6 +593,18 @@
                 sheetDimensionReference = "A1:" + new XLAddress((Int32)maxRow, (Int32)maxColumn).ToString();
             }
 
+            if (xlWorksheet.ColumnsCollection.Count > 0)
+            {
+                UInt32 maxColCollection = (UInt32)xlWorksheet.ColumnsCollection.Keys.Max();
+                if (maxColCollection > maxColumn) maxColumn = maxColCollection;
+            }
+
+            if (xlWorksheet.RowsCollection.Count > 0)
+            {
+                UInt32 maxRowCollection = (UInt32)xlWorksheet.RowsCollection.Keys.Max();
+                if (maxRowCollection > maxRow) maxRow = maxRowCollection;
+            }
+
             SheetDimension sheetDimension = new SheetDimension() { Reference = sheetDimensionReference };
 
             Boolean tabSelected = xlWorksheet.Name == Worksheets.GetWorksheet(0).Name;
@@ -631,7 +643,7 @@
             var distinctRows = allRows.Distinct();
             foreach (var distinctRow in distinctRows.OrderBy(r => r))
             {
-                Row row = new Row() { RowIndex = (UInt32Value)(UInt32)distinctRow, Spans = new ListValue<StringValue>() { InnerText = "1:" + maxColumn.ToString() } };
+                Row row = new Row() { RowIndex = (UInt32Value)(UInt32)distinctRow, Spans = new ListValue<StringValue>() { InnerText = "1:" + maxRow.ToString() } };
                 if (xlWorksheet.RowsCollection.ContainsKey(distinctRow))
                 {
                     var thisRow = xlWorksheet.RowsCollection[distinctRow];
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorksheet.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorksheet.cs
index d526c6a..f4440a6 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorksheet.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorksheet.cs
@@ -21,14 +21,12 @@
 
         public XLWorksheet(String sheetName)
         { 
-            var defaultAddress = new XLAddress(0,0);
-            DefaultCell = new XLCell(defaultAddress, XLWorkbook.DefaultStyle);
-            cellsCollection.Add(defaultAddress, DefaultCell);
+            Style = XLWorkbook.DefaultStyle;
             MergedCells = new List<String>();
             RowNumber = 1;
             ColumnNumber = 1;
             ColumnLetter = "A";
-            var tmp = this.Cell(1, 1).Value;
+            //var tmp = this.Cell(1, 1).Value;
             this.Name = sheetName;
         }
 
@@ -57,7 +55,6 @@
             get { return new XLAddress(MaxNumberOfRows, MaxNumberOfColumns); }
         }
 
-        private IXLCell DefaultCell { get; set; }
         public Int32 RowNumber { get; private set; }
         public Int32 ColumnNumber { get; private set; }
         public String ColumnLetter { get; private set; }
@@ -79,15 +76,16 @@
 
         #region IXLStylized Members
 
+        private IXLStyle style;
         public IXLStyle Style
         {
             get
             {
-                return DefaultCell.Style;
+                return style;
             }
             set
             {
-                DefaultCell.Style = value;
+                style = new XLStyle(this, value);
             }
         }
 
diff --git a/ClosedXML/ClosedXML/ClosedXML_Examples/ClosedXML_Examples.csproj b/ClosedXML/ClosedXML/ClosedXML_Examples/ClosedXML_Examples.csproj
index 8bf9770..34b9955 100644
--- a/ClosedXML/ClosedXML/ClosedXML_Examples/ClosedXML_Examples.csproj
+++ b/ClosedXML/ClosedXML/ClosedXML_Examples/ClosedXML_Examples.csproj
@@ -50,6 +50,7 @@
   <ItemGroup>
     <Compile Include="BasicTable.cs" />
     <Compile Include="Columns\ColumnSettings.cs" />
+    <Compile Include="Columns\ColumnCollections.cs" />
     <Compile Include="Columns\InsertColumns.cs" />
     <Compile Include="HelloWorld.cs" />
     <Compile Include="Misc\MergeCells.cs" />
diff --git a/ClosedXML/ClosedXML/ClosedXML_Examples/Columns/ColumnCollections.cs b/ClosedXML/ClosedXML/ClosedXML_Examples/Columns/ColumnCollections.cs
new file mode 100644
index 0000000..ffe44dc
--- /dev/null
+++ b/ClosedXML/ClosedXML/ClosedXML_Examples/Columns/ColumnCollections.cs
@@ -0,0 +1,75 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using ClosedXML.Excel;
+using ClosedXML.Excel.Style;
+using System.Drawing;
+
+namespace ClosedXML_Examples.Columns
+{
+    public class ColumnCollection
+    {
+        #region Variables
+
+        // Public
+
+        // Private
+
+
+        #endregion
+
+        #region Properties
+
+        // Public
+
+        // Private
+
+        // Override
+
+
+        #endregion
+
+
+        #region Events
+
+        // Public
+
+        // Private
+
+        // Override
+
+
+        #endregion
+
+        #region Methods
+
+        // Public
+        public void Create(String filePath)
+        {
+            var workbook = new XLWorkbook();
+            var ws = workbook.Worksheets.Add("Column Collection");
+
+            foreach (var c in ws.Range("B2:C3").Columns())
+            {
+                c.Style.Fill.BackgroundColor = Color.Red;
+            }
+
+            ws.Cell("E1").Value = "Wide 2";
+
+            foreach (var c in ws.Columns())
+            {
+                c.Width = 20;
+            }
+
+            workbook.SaveAs(filePath);
+        }
+
+        // Private
+
+        // Override
+
+
+        #endregion
+    }
+}
diff --git a/ClosedXML/ClosedXML/ClosedXML_Examples/Program.cs b/ClosedXML/ClosedXML/ClosedXML_Examples/Program.cs
index f511ee6..d16c92a 100644
--- a/ClosedXML/ClosedXML/ClosedXML_Examples/Program.cs
+++ b/ClosedXML/ClosedXML/ClosedXML_Examples/Program.cs
@@ -13,14 +13,15 @@
     {
         static void Main(string[] args)
         {
-            new HelloWorld().Create(@"c:\HelloWorld.xlsx");
-            new BasicTable().Create(@"c:\BasicTable.xlsx");
-            new StyleExamples().Create();
-            new ColumnSettings().Create(@"c:\ColumnSettings.xlsx");
+            //new HelloWorld().Create(@"c:\HelloWorld.xlsx");
+            //new BasicTable().Create(@"c:\BasicTable.xlsx");
+            //new StyleExamples().Create();
+            //new ColumnSettings().Create(@"c:\ColumnSettings.xlsx");
             new RowSettings().Create(@"c:\RowSettings.xlsx");
-            new MergeCells().Create(@"c:\MergedCells.xlsx");
-            new InsertRows().Create(@"c:\InsertRows.xlsx");
-            new InsertColumns().Create(@"c:\InsertColumns.xlsx");
+            //new MergeCells().Create(@"c:\MergedCells.xlsx");
+            //new InsertRows().Create(@"c:\InsertRows.xlsx");
+            //new InsertColumns().Create(@"c:\InsertColumns.xlsx");
+            //new ColumnCollection().Create(@"c:\ColumnCollection.xlsx");
         }
     }
 }
\ No newline at end of file