C# detect process exit

Question

I have following code:

   private void fileSystemWatcher_Changed(object sender, System.IO.FileSystemEventArgs e)
    {
        System.Diagnostics.Process execute = new System.Diagnostics.Process();

        execute.StartInfo.FileName = e.FullPath;
        execute.Start();

        //Process now started, detect exit here

    }

The FileSystemWatcher is watching a folder where .exe files are getting saved into. The files which got saved into that folder are executed correctly. But when the opened exe closes another function should be triggered.

Is there a simple way to do that?

Answer 1

Attach to the Process.Exited event. Example:

System.Diagnostics.Process execute = new System.Diagnostics.Process();    
execute.StartInfo.FileName = e.FullPath;    
execute.EnableRaisingEvents = true;

execute.Exited += (sender, e) => {
    Debug.WriteLine("Process exited with exit code " + execute.ExitCode.ToString());
}

execute.Start();    

Answer 2

Process.WaitForExit.

And incidentally, since Process implements IDisposable, you really want:

using (System.Diagnostics.Process execute = new System.Diagnostics.Process())
{
    execute.StartInfo.FileName = e.FullPath; 
    execute.Start(); 

    //Process now started, detect exit here 
}