asp.net automatically closes the Excel process code when the XLS file is finished

ASP tutorials automatically close the Excel process code when the. NET build xls file completes
Method One

Gc.collect ();
ApplicationClass Excel;
_workbook XBK;
_worksheet xst;
Excel = new ApplicationClass ();
XBK = Excel.workbooks.add (true);
Xst = (_worksheet) xbk.activesheet;
Custom code ...
At the end
Xbk.close (false, NULL, NULL);
Excel.quit ();
System.runtime.interops Tutorial Ervices.marshal.releasecomobject (XBK);
System.Runtime.InteropServices.Marshal.ReleaseComObject (Excel);
System.Runtime.InteropServices.Marshal.ReleaseComObject (XST);
XBK = null;
Excel = null;
XST = null;

Method Two

Finally
{
((microexcel._application) tempapp). Workbooks.close ();
Int32 tempgeneration = Gc.getgeneration (Tempapp);
((microexcel._application) Tempapp). Quit ();
Gc.collect (tempgeneration);
The above section has already killed the Excel process in WinForm, but not in the ASP.net tutorial
Process[] myprocesses;
myprocesses = Process.getprocessesbyname ("Excel");

               //No Excel process ID, Only process start time can be judged temporarily
                foreach (Process myprocess in myprocesses)
                 {
                     Try
                     {
                         datetime starttime = Myprocess.starttime;

if (starttime >= tempstart && starttime <= tempend)
{
Myprocess.kill ();
}
}//to run a Web page directly in VS, there's no question of StartTime.
catch//There are some core processes that are not allowed to be accessed, so the exception that is caused can catch and discard processing
{ }
}

}