C#

using ExcelInterop = Microsoft.Office.Interop.Excel;<br />
 <br />
  ExcelInterop._Worksheet ExcelWorkSheet; //represents the resulting worksheet.<br />
 <br />
            Microsoft.Office.Interop.Excel.Application excelApp = null;<br />
            try<br />
            {<br />
                excelApp = new ExcelInterop.ApplicationClass();<br />
 <br />
               <br />
                excelApp.Visible = true;<br />
 <br />
                string path = txtOutputPath.Text; //full file path is given.<br />
                excelApp.Workbooks.Open(path, 0, false, 2, "", "", false, Microsoft.Office.Interop.Excel.XlPlatform.xlWindow  s, "", true, false, 0, true, false, false);<br />
                ExcelWorkSheet = (ExcelInterop._Worksheet)(excelApp.ActiveWorkbook.  ActiveSheet);<br />
                ExcelWorkSheet.Columns.AutoFit();<br />
                ExcelWorkSheet.Columns.HorizontalAlignment = ExcelInterop.XlHAlign.xlHAlignLeft; //aligns values to the left.<br />
                ExcelWorkSheet._DisplayRightToLeft = 0; //makes the excel to display as left-to-right.<br />
            }<br />
            catch (Exception ex) //Used to catch exception of type "System.Runtime.InteropServices.COMException"<br />
            {<br />
                if (excelApp != null)<br />
                    excelApp.Quit();<br />
                MessageBox.Show(ex.Message);<br />
            }