Hello,

I get an exception when I use the Infragistics.Excel in background thread.

Version : 2010.2

Code (in bakcground thread)

      worksheet.Rows[0].Cells[0].CellFormat.FillPatternForegroundColor = Colors.Cyan;

Exception:

System.UnauthorizedAccessException was unhandled by user code
  Message=Accès inter-threads non valide.
  StackTrace:
       à MS.Internal.XcpImports.CheckThread()
       à MS.Internal.XcpImports.SystemSetting_GetSystemColor(Int32 colorIndex)
       à System.Windows.SystemColors.GetSystemColor(ColorIndex colorIndex)
       à System.Windows.SystemColors.get_WindowTextColor()
       à Infragistics.Documents.Excel.WorkbookColorCollection.Add(Color color, ColorableItem item)
       à Infragistics.Documents.Excel.WorksheetCellFormatData.set_FillPatternForegroundColor(Color value)
       à Infragistics.Documents.Excel.WorksheetCellFormatProxy.set_FillPatternForegroundColor(Color value)
       à ExcelBgThread.MainPage.bg_DoWork(Object sender, DoWorkEventArgs e)
       à System.ComponentModel.BackgroundWorker.OnDoWork(DoWorkEventArgs e)
       à System.ComponentModel.BackgroundWorker.OnRun(Object argument)
  InnerException:

You will find a project reproducing the problem in attachment,

Regards,