Process.HasExited returns true even though process is running?

Question

I have been observing that Process.HasExited sometimes returns true even though the process is still running.

My code below starts a proces

Answer 1

There's two possibilities, the process object continues to hold a reference to the process, so it has exited, but it hasn't yet been deleted. Or you have a second instance of the process running. You should also compare the process Id to make sure. Try this.

    ....

    // Start the program
    process.Start();


    while (!process.HasExited)
        Thread.Sleep( 500 );

    Process[] p = Process.GetProcessesByName( "testprogram" );
    if ( p.Length != 0 && p[0].Id == process.id && ! p[0].HasExited)
        throw new Exception("Oh oh");