///// <summary>/// 1.Clear CircleReference/// 2.Set Page to Fit Wide/// 3.Set Column Text fit/// </summary>/// <param name="app"></param>/// <param name="ws"></param>private void WorkSheetPageSet(Microsoft.Office.Interop.Excel.Application app, Worksheet ws){ ClearCircleReference(ws); SetPagetoFitWide(ws); SetColumnFit(ws);}///// <summary>/// Set Column Text fit/// </summary>/// <param name="sheet"></param>private static void SetColumnFit(Worksheet sheet){ char column = 'B'; for (int i = 0; i < 25; i++) {  Range range = sheet.get_Range(String.Format("{0}1", column.ToString()),   String.Format("{0}1", column.ToString()));  if (range != null)  {   range.EntireColumn.AutoFit();  }  column++; }}///// <summary>/// Clear CircleReference/// </summary>/// <param name="sheet">Worksheet object</param>private void ClearCircleReference(Worksheet sheet){ Range range = sheet.CircularReference; while (range != null) {  range.Clear();  range = sheet.CircularReference; }}///// <summary>/// Set Page to Fit Wide/// </summary>/// <param name="ws">Worksheet object</param>private static void SetPagetoFitWide(Worksheet ws){ ws.PageSetup.Zoom = false; ws.PageSetup.FitToPagesWide = 1; ws.PageSetup.FitToPagesTall = false;}