Using EPPlus in AX 2012 as an Excel writer

static void GOA_EPPlus(Args _args)
{
    System.IO.FileInfo      newFileInfo;
    System.IO.FileInfo      tmpFileInfo;
    Filename    newFileName = WinAPI::getTempPath() +  "GOA_InvoiceProposalAnalysis.xlsm";
    Filename    tmpFileName = TemplateProvider_RU::getFor(_args).get(resourceStr(GOA_InvoiceProposalAnalysis));

    OfficeOpenXml.ExcelPackage ExcelPkg;
    OfficeOpenXml.ExcelWorkbook ExcelWorkbook;
    OfficeOpenXml.ExcelWorksheets ExcelWorksheets;
    OfficeOpenXml.ExcelWorksheet ExcelWorksheet;
    OfficeOpenXml.ExcelRange    ExcelRange;
    OfficeOpenXml.ExcelRange    Cell;

    Bookmark            bookmark;
    int i;
    int row = 2;

    GOA_ViewInvoiceProposal    viewInvoiceProposal ;

    newFileInfo = new System.IO.FileInfo(newFileName);
    tmpFileInfo = new System.IO.FileInfo(tmpFileName);

    ExcelPkg = new OfficeOpenXml.ExcelPackage(newFileInfo, tmpFileInfo);

    ExcelWorkbook = ExcelPkg.get_Workbook();
    ExcelWorksheets = ExcelWorkbook.get_Worksheets();
    ExcelWorksheet = ExcelWorksheets.get_Item("Data");
    ExcelRange = ExcelWorksheet.get_Cells();

    while select viewInvoiceProposal
    {
        i = 1;

        bookmark = ComExcelDocument_RU::numToNameCell(i,row);
        Cell = ExcelRange.get_Item(bookmark);
        Cell.set_Value(viewInvoiceProposal.TypeView);
        i++;
        bookmark = ComExcelDocument_RU::numToNameCell(i,row);
        Cell = ExcelRange.get_Item(bookmark);
        Cell.set_Value(viewInvoiceProposal.TypeView);
        i++;
        bookmark = ComExcelDocument_RU::numToNameCell(i,row);
        Cell = ExcelRange.get_Item(bookmark);
        Cell.set_Value(viewInvoiceProposal.CustAccount);

        row++;
    }
    ExcelPkg.Save();
}