How to close an external application using c#

Question

Im trying to be close the calculator when the user press's a key on the key board. But p.kill and p.CloseMainWindow doesn't kill the calculator, only the shell which is executed.

Process p = new Process();
p.StartInfo.FileName = "cmd";
p.StartInfo.Arguments = "/c calc ";
p.StartInfo.CreateNoWindow = true;
p.StartInfo.UseShellExecute = false;
p.Start();
Console.WriteLine("Press any key to kill Calc");
Console.ReadKey();
p.CloseMainWindow();

p.Kill();

Answer 1

Don't use the shell (cmd) but run the calc process directly. Setting Process.StartInfo.FileName to "calc" should do it (assuming calc.exe is on the system path).

Answer 2

You need to find the Calculator process and kill it. There are actually two processes created: one for the cmd and the other for Calculator. You are killing only the first one.

The other solution is to start the Calculator directly, without using cmd.