Waiting for a program to close before opening another?

You can you lock to lock first process

 lock (this)
            {
               
            }

I like to use a named mutex.  Have your first app aquire a named mutex, and release it when closing.  Then your second app can either poll the named mutex or just try to acquire it with an infinite timeout - in either case when the mutex is acquired the first app has closed.  VStudio help has examples or I can give a link.

I was thinking about using "Process" like so...

Here Form1 (via button event) calls Form2 to open.

Then within the Form2_Load, place this code:

[form2]

private void Form2_Load(object sender, EventArgs e)
{
     Process[] main = Process.GetProcessesByName("Form1"); // main program

            if (main.Length == 0)
            {
                Process proc = new Process();
                proc.StartInfo.FileName = @"C:\Movefiles.exe";                
                proc.Start();            
            }
            else
            {
                Thread.Sleep(30000);
            }
}

Well, the Process method works great except two program windows open instead of just one.

NOTE: Only ONE program window opens if I manually double-click the Movefiles.exe with its directory.

Two windows open using the following code.

I call the Form2 from Form1 then exit like so:

[Form1]
 private void menuItemAppExit_Click(object sender, System.EventArgs e)
        {
                Process proc = new Process();
                proc.StartInfo.FileName = @"C:\Movefiles.exe";
                proc.Start();      
            }
            Application.Exit();
        }

I was calling the method twice.

Once in the actual menuItemAppExit and then again calling menuItemAppExit in Form1_Leaving event.