How to know when a process created by Process.Start() was closed?

Question

I\'m using this:

var proc2 = Process.Start(Path.GetFullPath(filename));
proc2.Exited += (_, __) =>
{
    MessageBox.Show(\"closed!\");
};

<

Answer 1

You forgot to set the EnableRaisingEvents to true.

Also, you may want to create a Process with the constructor, set the ProcessStartInfo and then call Start after you register to listen to the event. Otherwise you have a race condition where the Process exits before you even register to listen for the event (unlikely I know, but not mathematically impossible).

var process = new Process();

process.StartInfo = new ProcessStartInfo(Path.GetFullPath(filename));
process.EnableRaisingEvents = true;

process.Exited += (a, b) =>
{
  MessageBox.Show("closed!");
};

process.Start();