释放excel实例

如何释放为我下面的代码创建的excel实例?终止excel实例

Excel.Workbook Workbook1 = xCel.Workbooks.Open(ExcelFilePath);                
Excel.Workbook Workbook2 = xCel.Workbooks.Add();
foreach (Excel.Worksheet dummysheet in Workbook1.Worksheets)
{                 
  dummysheet.Copy(Workbook2.Worksheets[1],Type.Missing);
}
Workbook2.SaveAs(strFileCopyPath);

//代码释放excel实例

if (sourceWorkbook != null)
                {                   
                    sourceWorkbook = null;
                    destinationWorkbook = null;
                    Thread.Sleep(500);
                }
                if (status.ProcessID > 0)
                 {                    
                    Process p = Process.GetProcessById(status.ProcessID);
                    p.Kill();
                 }
                GC.Collect();
                GC.WaitForPendingFinalizers();
                GC.Collect();
                GC.WaitForPendingFinalizers();
                try { Marshal.FinalReleaseComObject(sourceWorkbook); }
                catch { }
                try { Marshal.FinalReleaseComObject(destinationWorkbook); }
                catch { } 

请检查是否正确。

我知道这是重复的，我只是想让你们检查一下这是否正确。

GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();
GC.WaitForPendingFinalizers();