Question

I am open and close an excel book fro mC# like this

Microsoft.Office.Interop.Excel.Application oXL = null;
Microsoft.Office.Interop.Excel.Workbook excelWorkbook  = null;

try
{

    excelWorkbook = oXL.Workbooks.Open(MyFile,
                0, false, 5, "", "", false, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "",
                true, false, 0, true, false, false);

    .....
    ....
    ....

    excelWorkbook.Save();
    excelWorkbook.Close(Microsoft.Office.Interop.Excel.XlSaveAction.xlSaveChanges, Type.Missing, Type.Missing);
    oXL.Quit();
    excelWorkbook = null;
    oXL = null;

}
catch { }

But there is stil lan EXCEL.EXE process left running in the task list, why ?
how do I “kill” everything about excel when I am done ?
Is it not enough with “.Quit()” and put the reference to null ?

or is there some magic reference left in the C# heap somewhere that have not been
dereferenced ?

/Stefan

Answer 1

Try this..

oXL.quit()

// Note, oXL still points to excel

System.Runtime.InteropServices.Marshal.ReleaseComObject(oXL)
System.Runtime.InteropServices.Marshal.FinalReleaseComObject(oXL)
oXL = Nothing