xlMappe.Save()
xlMappe.Close()
xlApp.Quit()
 
xlApp.Dispose() '// wenn die Methode Dispose vorhanden ist.
xlMappe.Dispose()
 
xlApp = Nothing
xlMappe = Nothing
 
'// GC ausführen
GC.Collect()
GC.WaitForPendingFinalizers()
GC.Collect()
GC.WaitForPendingFinalizers()