[Solved] How can I Export a datatable to an excel sheet with user-defined row no of the excel sheet from c#?

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I tried this one I got the answer. For those who downvoted my question, there is a possible to do the way. First you should think the route and work

private static Microsoft.Office.Interop.Excel.Workbook mWorkBook;
private static Microsoft.Office.Interop.Excel.Sheets mWorkSheets;
private static Microsoft.Office.Interop.Excel.Worksheet mWSheet1;
private static Microsoft.Office.Interop.Excel.Application oXL;
public static void ReadExistingExcel()
{
   string path = @"C:\Tool\Reports1.xls";
   oXL = new Microsoft.Office.Interop.Excel.Application();
   oXL.Visible = true;
   oXL.DisplayAlerts = false;
   mWorkBook = oXL.Workbooks.Open(path, 0, false, 5, "", "", false, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "", true, false, 0, true, false, false);
   //Get all the sheets in the workbook
  mWorkSheets = mWorkBook.Worksheets;
   //Get the allready exists sheet
   mWSheet1 = (Microsoft.Office.Interop.Excel.Worksheet)mWorkSheets.get_Item("Sheet1");
   Microsoft.Office.Interop.Excel.Range range= mWSheet1.UsedRange;
   int colCount = range.Columns.Count;
   int rowCount= range.Rows.Count;
   for (int index = 1; index < 15; index++)
   {
      mWSheet1.Cells[rowCount + index, 1] = rowCount +index;
      mWSheet1.Cells[rowCount + index, 2] = "New Item"+index;
   }
   mWorkBook.SaveAs(path, Microsoft.Office.Interop.Excel.XlFileFormat.xlWorkbookNormal,
   Missing.Value, Missing.Value, Missing.Value,    Missing.Value,Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlExclusive,
   Missing.Value, Missing.Value, Missing.Value,
   Missing.Value, Missing.Value);
   mWorkBook.Close(Missing.Value, Missing.Value, Missing.Value);
   mWSheet1 = null;
   mWorkBook = null;
   oXL.Quit();
   GC.WaitForPendingFinalizers();
   GC.Collect();
   GC.WaitForPendingFinalizers();
   GC.Collect();
}

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solved How can I Export a datatable to an excel sheet with user-defined row no of the excel sheet from c#?