title: Problem with hanging interop COM objects
body: <p>I have an application that uses COM interop to create a spreadsheet which is opened in Excel on the client's machine. It appears, however, that the EXCEL.exe process isn't always ended when Excel is closed by the user if I look at Task Manager.</p>
  
  <p>If I was saving the workbook and programmatically closing Excel, I would just use <code>Marshal.ReleaseComObject()</code> to clean up, but since I'm depending on a manual close of the program, I'm not sure what to do. Any suggestions?</p>