diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/IXLColumns.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/IXLColumns.cs
index d643370..e313e45 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/IXLColumns.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/IXLColumns.cs
@@ -7,7 +7,9 @@
 {
     public interface IXLColumns: IEnumerable<IXLColumn>, IXLStylized
     {
-        Double Width { get; set; }
+        Double Width { set; }
         void Delete();
+        void Add(IXLColumn column);
+
     }
 }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/XLColumns.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/XLColumns.cs
index d3d1439..e245a95 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/XLColumns.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/XLColumns.cs
@@ -7,6 +7,11 @@
 {
     public class XLColumns: IXLColumns
     {
+        public XLColumns()
+        {
+            Style = XLWorkbook.DefaultStyle;
+        }
+
         List<IXLColumn> columns = new List<IXLColumn>();
         public IEnumerator<IXLColumn> GetEnumerator()
         {
@@ -30,6 +35,7 @@
             set
             {
                 style = new XLStyle(this, value);
+
             }
         }
 
@@ -41,6 +47,7 @@
                 yield return style;
                 foreach (var col in columns)
                 {
+                    yield return col.Style;
                     foreach (var c in col.Internals.Worksheet.Internals.CellsCollection.Values.Where(c => c.Address.Column == col.Internals.FirstCellAddress.Column))
                     {
                         yield return c.Style;
@@ -56,19 +63,21 @@
 
         public double Width
         {
-            get
-            {
-                throw new NotImplementedException();
-            }
             set
             {
-                throw new NotImplementedException();
+                columns.ForEach(c => c.Width = value);
             }
         }
 
         public void Delete()
         {
-            this.Column(ColumnNumber).Delete(XLShiftDeletedCells.ShiftCellsLeft);
+            columns.ForEach(c => c.Delete(XLShiftDeletedCells.ShiftCellsLeft));
+        }
+
+
+        public void Add(IXLColumn column)
+        {
+            columns.Add(column);
         }
     }
 }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/IXLWorksheet.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/IXLWorksheet.cs
index f505159..b9602d6 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/IXLWorksheet.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/IXLWorksheet.cs
@@ -12,9 +12,9 @@
         new IXLColumn Column(String column);
         String Name { get; set; }
         IXLColumns Columns();
-        List<IXLColumn> Columns(String columns);
-        List<IXLColumn> Columns(String firstColumn, String lastColumn);
-        List<IXLColumn> Columns(Int32 firstColumn, Int32 lastColumn);
+        IXLColumns Columns(String columns);
+        IXLColumns Columns(String firstColumn, String lastColumn);
+        IXLColumns Columns(Int32 firstColumn, Int32 lastColumn);
         List<IXLRow> Rows();
         List<IXLRow> Rows(String rows);
         List<IXLRow> Rows(Int32 firstRow, Int32 lastRow); 
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorksheet.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorksheet.cs
index c486d9b..a3b26c1 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorksheet.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorksheet.cs
@@ -26,6 +26,8 @@
             this.Name = sheetName;
         }
 
+        //private IXLColumns xlColumns = new XLColumns();
+
         public IXLWorksheetInternals Internals { get; private set; }
 
         #region IXLRange Members
@@ -34,9 +36,9 @@
         public Int32 ColumnNumber { get; private set; }
         public String ColumnLetter { get; private set; }
 
-        public List<IXLColumn> Columns()
+        public IXLColumns Columns()
         {
-            var retVal = new List<IXLColumn>();
+            var retVal = new XLColumns();
             var columnList = new List<Int32>();
 
             if (Internals.CellsCollection.Count > 0)
@@ -52,30 +54,47 @@
 
             return retVal;
         }
-        public List<IXLColumn> Columns(String columns)
+        public IXLColumns Columns(String columns)
         {
-            var retVal = new List<IXLColumn>();
+            var retVal = new XLColumns();
             var columnPairs = columns.Split(',');
             foreach (var pair in columnPairs)
             {
-                var columnRange = pair.Split(':');
-                var firstColumn = columnRange[0];
-                var lastColumn = columnRange[1];
+                String firstColumn;
+                String lastColumn;
+                if (pair.Contains(':'))
+                {
+                    var columnRange = pair.Split(':');
+                    firstColumn = columnRange[0];
+                    lastColumn = columnRange[1];
+                }
+                else
+                {
+                    firstColumn = pair;
+                    lastColumn = pair;
+                }
+                
                 Int32 tmp;
                 if (Int32.TryParse(firstColumn, out tmp))
-                    retVal.AddRange(Columns(Int32.Parse(firstColumn), Int32.Parse(lastColumn)));
+                    foreach (var col in Columns(Int32.Parse(firstColumn), Int32.Parse(lastColumn)))
+                    {
+                        retVal.Add(col);
+                    }
                 else
-                    retVal.AddRange(Columns(firstColumn, lastColumn));
+                    foreach (var col in Columns(firstColumn, lastColumn))
+                    {
+                        retVal.Add(col);
+                    }
             }
             return retVal;
         }
-        public List<IXLColumn> Columns(String firstColumn, String lastColumn)
+        public IXLColumns Columns(String firstColumn, String lastColumn)
         {
             return Columns(XLAddress.GetColumnNumberFromLetter(firstColumn), XLAddress.GetColumnNumberFromLetter(lastColumn));
         }
-        public List<IXLColumn> Columns(Int32 firstColumn, Int32 lastColumn)
+        public IXLColumns Columns(Int32 firstColumn, Int32 lastColumn)
         {
-            var retVal = new List<IXLColumn>();
+            var retVal = new XLColumns();
 
             for (var co = firstColumn; co <= lastColumn; co++)
             {
diff --git a/ClosedXML/ClosedXML/ClosedXML_Examples/Columns/ColumnCollections.cs b/ClosedXML/ClosedXML/ClosedXML_Examples/Columns/ColumnCollections.cs
index 04f625c..d12c083 100644
--- a/ClosedXML/ClosedXML/ClosedXML_Examples/Columns/ColumnCollections.cs
+++ b/ClosedXML/ClosedXML/ClosedXML_Examples/Columns/ColumnCollections.cs
@@ -57,27 +57,30 @@
             ws.Cell("E1").Value = "Wide 2";
 
             // Only the used columns in a worksheet
-            ws.Columns().ForEach(c => c.Width = 20);
+            ws.Columns().Width = 20; 
 
             var ws2 = workbook.Worksheets.Add("Multiple Columns");
             
             // Contiguous columns by number
-            ws2.Columns(1, 2).ForEach(c => c.Style.Fill.BackgroundColor = Color.Red);
+            ws2.Columns(1, 2).Style.Fill.BackgroundColor = Color.Red;
 
             // Contiguous columns by letter
-            ws2.Columns("D", "E").ForEach(c => c.Style.Fill.BackgroundColor = Color.Blue);
+            ws2.Columns("D", "E").Style.Fill.BackgroundColor = Color.Blue;
 
             // Contiguous columns by letter
-            ws2.Columns("G:H").ForEach(c => c.Style.Fill.BackgroundColor = Color.Blue);
+            ws2.Columns("G:H").Style.Fill.BackgroundColor = Color.DeepPink;
 
             // Spread columns by number
-            ws2.Columns("10:11,13:14").ForEach(c => c.Style.Fill.BackgroundColor = Color.Orange);
+            ws2.Columns("10:11,13:14").Style.Fill.BackgroundColor = Color.Orange;
 
             // Spread columns by letter
-            ws2.Columns("P:Q,S:T").ForEach(c => c.Style.Fill.BackgroundColor = Color.Turquoise);
+            ws2.Columns("P:Q,S:T").Style.Fill.BackgroundColor = Color.Turquoise;
 
-            ws2.Columns("A:T").ForEach(c => c.Width = 3);
+            // Use a single number/letter
+            ws2.Columns("V").Style.Fill.BackgroundColor = Color.Cyan;
 
+            ws2.Columns("A:V").Width = 3;
+            
             workbook.SaveAs(filePath);
         }
 
diff --git a/ClosedXML/ClosedXML/ClosedXML_Examples/PageSetup/SheetTab.cs b/ClosedXML/ClosedXML/ClosedXML_Examples/PageSetup/SheetTab.cs
index 5f67b5c..873b228 100644
--- a/ClosedXML/ClosedXML/ClosedXML_Examples/PageSetup/SheetTab.cs
+++ b/ClosedXML/ClosedXML/ClosedXML_Examples/PageSetup/SheetTab.cs
@@ -26,7 +26,7 @@
             ws.PageSetup.SetRowTitles(ws.Rows(1, 2));
 
             // Adding columns to repeat at left
-            ws.PageSetup.SetColumnTitles(ws.Columns(1, 2));
+            //ws.PageSetup.SetColumnTitles(ws.Columns(1, 2));
 
             // Show gridlines
             ws.PageSetup.ShowGridlines = true;