[C #] Ways to end the process of Excel

excel| process in the forum often see asked how to end the Excel process of posts, many people give
The method is to get a list of system processes and then match "Excel", which is Excel
The process of killing, I personally think that this method is not feasible if the software in this way
Killing your startup process should be a bug (it's possible to kill the user Excel process).
I found another way to kill the Excel process on the Web, as follows:
System.Runtime.InteropServices.Marshal.ReleaseComObject (worksheets);
System.Runtime.InteropServices.Marshal.ReleaseComObject (worksheet);
...
System.Runtime.InteropServices.Marshal.ReleaseComObject (excelapp);
System.Runtime.InteropServices.Marshal.ReleaseComObject (range);
Worksheets=null;
Worksheet=null;
...
Excelapp=null;
Range=null;

Releases all the object instances used by the operation Excel file.

Then recycle the resources!
Gc. Collect ();

The above code is best to put in finally, prevent the operation of Excel files when an exception occurs and cannot be executed!

When you open Task Manager, see if the Excel process is gone!

Which friend if has the better method, also please contribute out, everybody studies together!