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POC# Excel Interop : Excel process remains in memory until parent form closed
 

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    <p>In my form I am doing something as simple as</p> <pre><code>private void btnPrintPickList_Click(object sender, EventArgs e) { using (var salesRpt = new SalesOrder(CurrentItem())) { salesRpt.CreateSpreadSheet(); salesRpt.Dispose(); } } </code></pre> <p>I have followed the "no 2 dots rule for excel interop".</p> <pre><code>protected ExcelSheet(bool documentVisible, XlPageOrientation orientation) { ExcelApplication = new Application {Visible = documentVisible}; WorkBooks = ExcelApplication.Workbooks; WorkBook = WorkBooks.Add(XlSheetType.xlWorksheet); SheetList = WorkBook.Worksheets; Orientation = orientation; WorkSheet = (Worksheet) ExcelApplication.ActiveSheet; } public Application ExcelApplication { get; private set; } public Workbook WorkBook { get; private set; } public Workbooks WorkBooks { get; private set; } public Worksheet WorkSheet { get; private set; } public Sheets SheetList { get; private set; } public XlPageOrientation Orientation { get; private set; } </code></pre> <p>the dispose method does the following.</p> <pre><code> public void Dispose() { for (int i = 1; i &lt;= SheetList.Count; i++) { Marshal.FinalReleaseComObject(SheetList[i]); } //Marshal.FinalReleaseComObject(WorkSheet); Marshal.FinalReleaseComObject(SheetList); Marshal.FinalReleaseComObject(WorkBook); WorkBooks.Close(); Marshal.FinalReleaseComObject(WorkBooks); ExcelApplication.Quit(); Marshal.FinalReleaseComObject(ExcelApplication); WorkSheet = null; SheetList = null; WorkBook = null; WorkBooks = null; ExcelApplication = null; } </code></pre> <p>In my testing, the EXCEL.exe process does not consistently get removed from the current processes in the taskbar once the Excel spreadsheet is printed.</p> <p>What am I doing wrong? </p>
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