How to Kill Task or stop running .exe file in ASP.net C#?

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C#

ASP.NET

C#3.5

C#6.0

Here i have a problem which is to kill a running task. My project flow is like this: 1) kill running test.exe program; 2) Copy test.exe file from server; 3) paste into the C drive; 4) run the test.exe file from C drive.

Thus each time i click the button, the test.exe should close and open back. It is because to get the updated test.exe file from server. But the problem is the test.exe is cannot close or kill. Please help me....

Code:

protected void Button1_Click(object sender, EventArgs e)
        {
            {
                //Kill the running program file
                foreach (var proc in Process.GetProcessesByName("test"))
                {
                    proc.Kill();
                }
            }
            try
            {
                //To Choose the path at server and c drive
                string fileName = "test.exe";
                string sourcepath = @"\\192.168.5.10\fbar\TOOLS\";
                string targetpath = @"c:\Test1\";

                string sourcefile = System.IO.Path.Combine(sourcepath, fileName);
                string destfile = System.IO.Path.Combine(targetpath, fileName);

                //Create Test1 folder if it not created
                if (!System.IO.Directory.Exists(targetpath))
                {
                    System.IO.Directory.CreateDirectory(targetpath);
                }
                //Copy the .exe file from server to c drive
                {
                    System.IO.File.Copy(sourcefile, destfile, true);
                }
                //Start the .exe file from c drive
                {
                    System.Diagnostics.Process.Start(@"c:\Test1\test.exe");
                }
            }
         catch (Exception)
            {
             //***Start this if file .exe cannot copy from server
                System.Diagnostics.Process.Start(@"c:\Test1\test.exe");
            }
        }