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            //--- Open the workbook and worksheet from which we will copy cells.
            ExcelApplication xla = new ExcelApplication();
            Workbook sourceWb = xla.Open(Page.MapPath("myfile.xlsx"));
            Worksheet sourceWs = sourceWb[0];

            //--- Create the workbook and and get the worksheet
            //--- into which we will paste cells.
            Workbook destWb = xla.Create(ExcelApplication.FileFormat.Xlsx);
            Worksheet destWs = destWb[0];

            //--- Define the area of cells to copy.
            Area srcArea = sourceWs.CreateArea("A1:F20");

            //--- Copy cell values, formulas and cell and number formatting.
            CopyPasteProperties copyPasteProps =
                 sourceWb.CreateCopyPasteProperties(
                 CopyPasteProperties.CopyPasteType.ValuesAndFormatting);

            //--- Paste the data onto the destination worksheet.
            destWs.CopyPaste(0, 0, srcArea, copyPasteProps);

            xla.Save(destWb, Page.Response, "copypasteoutput.xlsx", false);
        

          '--- Open the workbook and worksheet from which we will copy cells.
          Dim sourceWb As Workbook = xla.Open("MyDataSource.xls")
          Dim sourceWs As Worksheet = sourceWb(0)

          '--- Create the workbook and and get the worksheet
          '--- into which we will paste cells.
          Dim destWb As Workbook = xla.Create("MyNewWorkbook")
          Dim destWs As Worksheet = destWb(0)

          '--- Define the area of cells to copy.
          Dim srcArea As Area = sourceWs.CreateArea("A1:F20")

          '--- Copy cell values, formulas and cell and number formatting.
          Dim copyPasteProps As CopyPasteProperties = _
               sourceWb.CreateCopyPasteProperties( _
               CopyPasteProperties.CopyPasteType.ValueFormulasAndFormatting)

          '--- Paste the data onto the destination worksheet.
          destWs.CopyPaste(0, 0, srcArea, copyPasteProps)