diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Cells/IXLCell.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Cells/IXLCell.cs
index 7eaaf5d..ae96970 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Cells/IXLCell.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Cells/IXLCell.cs
@@ -38,6 +38,8 @@
         /// <exception cref="ArgumentException"></exception>
         XLCellValues DataType { get; set; }
 
+        IXLCell SetDataType(XLCellValues dataType);
+
         IXLCell SetValue<T>(T value);
 
         /// <summary>
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Cells/IXLCells.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Cells/IXLCells.cs
index e368d19..b6b843c 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Cells/IXLCells.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Cells/IXLCells.cs
@@ -30,6 +30,8 @@
         /// <exception cref="ArgumentException"></exception>
         XLCellValues DataType { set; }
 
+        IXLCells SetDataType(XLCellValues dataType);
+
         /// <summary>
         /// Clears the contents of these cells (including styles).
         /// </summary>
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Cells/XLCell.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Cells/XLCell.cs
index 00bb80c..15d39f5 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Cells/XLCell.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Cells/XLCell.cs
@@ -679,6 +679,12 @@
 
         #endregion
 
+        public IXLCell SetDataType(XLCellValues dataType)
+        {
+            DataType = dataType;
+            return this;
+        }
+
         internal XLCellValues dataType;
         public XLCellValues DataType
         {
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Cells/XLCells.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Cells/XLCells.cs
index f42b38f..d7da5b0 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Cells/XLCells.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Cells/XLCells.cs
@@ -171,6 +171,12 @@
             }
         }
 
+        public IXLCells SetDataType(XLCellValues dataType)
+        {
+            this.ForEach(c => c.DataType = dataType);
+            return this;
+        }
+
         public XLCellValues DataType
         {
             set
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/IXLColumn.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/IXLColumn.cs
index fa1190f..25c60da 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/IXLColumn.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/IXLColumn.cs
@@ -173,5 +173,7 @@
         /// Adds a vertical page break after this column.
         /// </summary>
         IXLColumn AddVerticalPageBreak();
+
+        IXLColumn SetDataType(XLCellValues dataType);
     }
 }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/IXLColumns.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/IXLColumns.cs
index e90a926..b30e5ae 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/IXLColumns.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/IXLColumns.cs
@@ -112,6 +112,8 @@
         /// <summary>
         /// Adds a vertical page break after these columns.
         /// </summary>
-        IXLColumns AddVerticalPageBreaks();        
+        IXLColumns AddVerticalPageBreaks();
+
+        IXLColumns SetDataType(XLCellValues dataType);
     }
 }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/XLColumn.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/XLColumn.cs
index 677a53b..d19b4be 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/XLColumn.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/XLColumn.cs
@@ -669,5 +669,11 @@
             Worksheet.PageSetup.AddVerticalPageBreak(this.ColumnNumber());
             return this;
         }
+
+        public IXLColumn SetDataType(XLCellValues dataType)
+        {
+            DataType = dataType;
+            return this;
+        }
     }
 }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/XLColumns.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/XLColumns.cs
index afbf817..c0f44e9 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/XLColumns.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Columns/XLColumns.cs
@@ -256,6 +256,12 @@
             foreach (var col in columns)
                 col.Worksheet.PageSetup.AddVerticalPageBreak(col.ColumnNumber());
             return this;
-        }        
+        }
+
+        public IXLColumns SetDataType(XLCellValues dataType)
+        {
+            columns.ForEach(c => c.DataType = dataType);
+            return this;
+        }
     }
 }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/IXLRange.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/IXLRange.cs
index 760e580..f4ec080 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/IXLRange.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/IXLRange.cs
@@ -240,6 +240,7 @@
         IXLRange Sort(XLSortOrientation sortOrientation, XLSortOrder sortOrder, Boolean matchCase);
         IXLRange Sort(XLSortOrientation sortOrientation, String elementsToSortBy, Boolean matchCase);
 
+        IXLRange SetDataType(XLCellValues dataType);
     }
 }
 
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/IXLRangeColumn.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/IXLRangeColumn.cs
index 096d50d..40be9ed 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/IXLRangeColumn.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/IXLRangeColumn.cs
@@ -91,6 +91,8 @@
         
         IXLRangeColumn Column(Int32 start, Int32 end);
         IXLRangeColumns Columns(String columns);
+
+        IXLRangeColumn SetDataType(XLCellValues dataType);
     }
 }
 
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/IXLRangeColumns.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/IXLRangeColumns.cs
index a5ad6a0..74cd7a9 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/IXLRangeColumns.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/IXLRangeColumns.cs
@@ -41,7 +41,7 @@
 
         IXLStyle Style { get; set; }
 
-        
+        IXLRangeColumns SetDataType(XLCellValues dataType);
 
     }
 }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/IXLRangeRow.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/IXLRangeRow.cs
index 86ddb4d..f91346c 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/IXLRangeRow.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/IXLRangeRow.cs
@@ -99,6 +99,8 @@
 
         IXLRangeRow Row(Int32 start, Int32 end);
         IXLRangeRows Rows(String rows);
+
+        IXLRangeRow SetDataType(XLCellValues dataType);
     }
 }
 
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/IXLRangeRows.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/IXLRangeRows.cs
index 388f011..1d7807b 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/IXLRangeRows.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/IXLRangeRows.cs
@@ -40,6 +40,6 @@
 
         IXLStyle Style { get; set; }
 
-        
+        IXLRangeRows SetDataType(XLCellValues dataType);
     }
 }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/IXLRanges.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/IXLRanges.cs
index 34682f0..095641b 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/IXLRanges.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/IXLRanges.cs
@@ -83,5 +83,6 @@
         /// <param name="includeStyles">if set to <c>true</c> will return all cells with a value or a style different than the default.</param>
         IXLCells CellsUsed(Boolean includeStyles);
 
+        IXLRanges SetDataType(XLCellValues dataType);
     }
 }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRange.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRange.cs
index a649692..f1e02a4 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRange.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRange.cs
@@ -952,6 +952,10 @@
                 lastColumnNumber);
         }
 
-
+        public IXLRange SetDataType(XLCellValues dataType)
+        {
+            DataType = dataType;
+            return this;
+        }
     }
 }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeColumn.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeColumn.cs
index 1433bb4..28fe738 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeColumn.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeColumn.cs
@@ -245,6 +245,12 @@
             }
             return retVal;
         }
+
+        public IXLRangeColumn SetDataType(XLCellValues dataType)
+        {
+            DataType = dataType;
+            return this;
+        }
     }
 }
 
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeColumns.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeColumns.cs
index 8350066..2fd57d5 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeColumns.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeColumns.cs
@@ -132,7 +132,11 @@
             }
         }
 
-
+        public IXLRangeColumns SetDataType(XLCellValues dataType)
+        {
+            ranges.ForEach(c => c.DataType = dataType);
+            return this;
+        }
 
     }
 }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeRow.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeRow.cs
index 527b46e..6a69d45 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeRow.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeRow.cs
@@ -260,6 +260,12 @@
             }
             return retVal;
         }
+
+        public IXLRangeRow SetDataType(XLCellValues dataType)
+        {
+            DataType = dataType;
+            return this;
+        }
     }
 }
 
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeRows.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeRows.cs
index c7142ff..d9a4156 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeRows.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRangeRows.cs
@@ -131,6 +131,10 @@
             }
         }
 
- 
+        public IXLRangeRows SetDataType(XLCellValues dataType)
+        {
+            ranges.ForEach(c => c.DataType = dataType);
+            return this;
+        }
     }
 }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRanges.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRanges.cs
index d9d9f7e..cb847e3 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRanges.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Ranges/XLRanges.cs
@@ -260,5 +260,11 @@
             }
             return (IXLCells)cells;
         }
+
+        public IXLRanges SetDataType(XLCellValues dataType)
+        {
+            ranges.ForEach(c => c.DataType = dataType);
+            return this;
+        }
     }
 }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Rows/IXLRow.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Rows/IXLRow.cs
index 196ecad..46a181e 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Rows/IXLRow.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Rows/IXLRow.cs
@@ -176,5 +176,7 @@
         /// Adds a horizontal page break after this row.
         /// </summary>
         IXLRow AddHorizontalPageBreak();
+
+        IXLRow SetDataType(XLCellValues dataType);
     }
 }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Rows/IXLRows.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Rows/IXLRows.cs
index 9c08ff5..5430247 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Rows/IXLRows.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Rows/IXLRows.cs
@@ -113,5 +113,7 @@
         /// Adds a horizontal page break after these rows.
         /// </summary>
         IXLRows AddHorizontalPageBreaks();
+
+        IXLRows SetDataType(XLCellValues dataType);
     }
 }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Rows/XLRow.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Rows/XLRow.cs
index 063d4c5..cca78d3 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Rows/XLRow.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Rows/XLRow.cs
@@ -708,5 +708,11 @@
             Worksheet.PageSetup.AddHorizontalPageBreak(this.RowNumber());
             return this;
         }
+
+        public IXLRow SetDataType(XLCellValues dataType)
+        {
+            DataType = dataType;
+            return this;
+        }
     }
 }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/Rows/XLRows.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/Rows/XLRows.cs
index b3565c1..52edcc1 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/Rows/XLRows.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/Rows/XLRows.cs
@@ -254,6 +254,12 @@
                 row.Worksheet.PageSetup.AddHorizontalPageBreak(row.RowNumber());
             }
             return this;
-        }        
+        }
+
+        public IXLRows SetDataType(XLCellValues dataType)
+        {
+            rows.ForEach(c => c.DataType = dataType);
+            return this;
+        }
     }
 }
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/XLAddress.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/XLAddress.cs
index 2d82e89..0e90d82 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/XLAddress.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/XLAddress.cs
@@ -363,14 +363,15 @@
         }
         #endregion
         #region Methods
+        private String trimmedAddress;
         public string GetTrimmedAddress()
         {
-            return ColumnLetter + m_rowNumber.ToStringLookup();
+            return trimmedAddress ?? (trimmedAddress = ColumnLetter + m_rowNumber.ToStringLookup());
         }
 
         public string ToStringRelative()
         {
-            return ColumnLetter + m_rowNumber.ToStringLookup();
+            return GetTrimmedAddress();
         }
 
         public string ToStringFixed()
diff --git a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs
index 8abc8cf..ece3ceb 100644
--- a/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs
+++ b/ClosedXML/ClosedXML/ClosedXML/Excel/XLWorkbook_Save.cs
@@ -70,22 +70,27 @@
             public IXLStyle Style;
         };
 
-        private CellValues GetCellValue(XLCell xlCell)
+        private readonly EnumValue<CellValues> cvSharedString = new EnumValue<CellValues>(CellValues.SharedString);
+        private readonly EnumValue<CellValues> cvInlineString = new EnumValue<CellValues>(CellValues.InlineString);
+        private readonly EnumValue<CellValues> cvNumber = new EnumValue<CellValues>(CellValues.Number);
+        private readonly EnumValue<CellValues> cvDate = new EnumValue<CellValues>(CellValues.Date);
+        private readonly EnumValue<CellValues> cvBoolean = new EnumValue<CellValues>(CellValues.Boolean);
+        
+        private EnumValue<CellValues> GetCellValue(XLCell xlCell)
         {
-            var xlCellValue = xlCell.DataType;
-            switch (xlCellValue)
+            switch (xlCell.DataType)
             {
-                case XLCellValues.Boolean: return CellValues.Boolean;
-                case XLCellValues.DateTime: return CellValues.Date;
-                case XLCellValues.Number: return CellValues.Number;
                 case XLCellValues.Text:
                     {
                         if (xlCell.ShareString)
-                            return CellValues.SharedString;
+                            return cvSharedString;
                         else
-                            return CellValues.InlineString;
+                            return cvInlineString;
                     }
-                case XLCellValues.TimeSpan: return CellValues.Number;
+                case XLCellValues.Number: return   cvNumber;
+                case XLCellValues.DateTime: return cvDate;
+                case XLCellValues.Boolean: return  cvBoolean;
+                case XLCellValues.TimeSpan: return cvNumber;
                 default: throw new NotImplementedException();
             }
         }
@@ -705,14 +710,26 @@
             UInt32 fillCount = 3;
             UInt32 borderCount = 1;
             Int32 numberFormatCount = 1;
-            var xlStyles = new List<IXLStyle>();
+            var xlStyles = new HashSet<IXLStyle>();
 
 
             foreach (var worksheet in Worksheets.Cast<XLWorksheet>())
             {
-                xlStyles.AddRange(worksheet.Styles);
-                worksheet.Internals.ColumnsCollection.Values.ForEach(c => xlStyles.Add(c.Style));
-                worksheet.Internals.RowsCollection.Values.ForEach(c => xlStyles.Add(c.Style));
+                foreach (var s in worksheet.Styles)
+                    if (!xlStyles.Contains(s))
+                        xlStyles.Add(s);
+
+                foreach (var s in worksheet.Internals.ColumnsCollection.Select(kp=>kp.Value.Style))
+                    if (!xlStyles.Contains(s))
+                        xlStyles.Add(s);
+
+                foreach (var s in worksheet.Internals.RowsCollection.Select(kp => kp.Value.Style))
+                    if (!xlStyles.Contains(s))
+                        xlStyles.Add(s);
+
+                //xlStyles.AddRange(worksheet.Styles);
+                //worksheet.Internals.ColumnsCollection.Values.ForEach(c => xlStyles.Add(c.Style));
+                //worksheet.Internals.RowsCollection.Values.ForEach(c => xlStyles.Add(c.Style));
             }
 
 
@@ -1778,6 +1795,7 @@
                 if (cellsByRow.ContainsKey(distinctRow))
                 {
                     var cellsByReference = row.Elements<Cell>().ToDictionary(c => c.CellReference.Value, c => c);
+                    Boolean isNewRow = !row.Elements<Cell>().Any();
                     foreach (var opCell in cellsByRow[distinctRow]
                         .OrderBy(c => c.Address.ColumnNumber)
                         .Select(c => (XLCell)c))
@@ -1797,8 +1815,8 @@
                         else
                         {
                             //isNewCell = true;
-                            cell = new Cell() { CellReference = cellReference };
-                            if (!row.Elements<Cell>().Any())
+                            cell = new Cell() { CellReference = new StringValue(cellReference) };
+                            if (isNewRow)
                             {
                                 row.Append(cell);
                             }
diff --git a/ClosedXML/ClosedXML/ClosedXML_Sandbox/Program.cs b/ClosedXML/ClosedXML/ClosedXML_Sandbox/Program.cs
index 2106cac..111f9ae 100644
--- a/ClosedXML/ClosedXML/ClosedXML_Sandbox/Program.cs
+++ b/ClosedXML/ClosedXML/ClosedXML_Sandbox/Program.cs
@@ -15,12 +15,12 @@
         static void xMain(string[] args)
         {
             //var fileName = "DataValidation";
-            //var fileName = "Sandbox";
-            var fileName = "Issue_0000";
+            var fileName = "Sandbox";
+            //var fileName = "Issue_0000";
             //var wb = new XLWorkbook(String.Format(@"c:\Excel Files\ForTesting\{0}.xlsx", fileName));
-            //var wb = new XLWorkbook();
-            //var ws = wb.Worksheets.Add("SheetX");
-            
+            var wb = new XLWorkbook();
+            var ws = wb.Worksheets.Add("SheetX");
+            ws.Cell(1, 1).Value = "1 234";
             
             //ws.Cell("A1").Value = "Category";
             //ws.Cell("A2").Value = "A";
@@ -37,16 +37,16 @@
             //Now, when i use workbook.Worksheet("CCR").Range("B1:C34").RangeUsed().
             //The expect is B1:C29.
 
-            //wb.SaveAs(String.Format(@"c:\Excel Files\ForTesting\{0}_Saved.xlsx", fileName));
+            wb.SaveAs(String.Format(@"c:\Excel Files\ForTesting\{0}_Saved.xlsx", fileName));
 
 
-            var start = DateTime.Now;
-            var wb = new XLWorkbook(@"C:\Excel Files\ForTesting\Issue_0000.xlsx");
-            var end = DateTime.Now;
-            Console.WriteLine(String.Format("Opened file in {0} seconds", (end - start).TotalSeconds));
-            var ws = wb.Worksheet(1);
-            var cell = ws.Cell(100000, 13);
-            Console.WriteLine(cell.GetString());
+            //var start = DateTime.Now;
+            //var wb = new XLWorkbook(@"C:\Excel Files\ForTesting\Issue_0000.xlsx");
+            //var end = DateTime.Now;
+            //Console.WriteLine(String.Format("Opened file in {0} seconds", (end - start).TotalSeconds));
+            //var ws = wb.Worksheet(1);
+            //var cell = ws.Cell(100000, 13);
+            //Console.WriteLine(cell.GetString());
             Console.ReadKey();
         }