WCF debugging: Event not triggering unless MessageBox.Show is performed

This one has me a bit perplexed. I have a Shown event for a form, but the event's implementation doesn't process unless I display a MessageBox.

Here is my code which does not work:

 private void MainForm_Shown(object sender, EventArgs e) { string[] arguments = Environment.GetCommandLineArgs(); foreach (var argument in arguments) { if (argument == "someArgs") { var something = doSomeStuff(); } } } 

Whenever I add a message box like this though, it works:

 private void MainForm_Shown(object sender, EventArgs e) { string[] arguments = Environment.GetCommandLineArgs(); foreach (var argument in arguments) { if (argument == "someArgs") { var something = doSomeSuff(); } else { MessageBox.Show(argument); } } } 

I have tried using both a Form_Load and Form_Activated event, but they both cause my program to crash entirely do to the implementation in doSomeStuff.

Just a little background of how this program works. I'm trying to establish a WCF connection. I have already successfully done this with some hard-coded values, but I'm trying to make it dynamic via the doSomeStuff method. I believe a race condition is occurring which the MessageBox is fixing somehow. Application A is starting Application B (the source code I have shown here) then sending a command line argument with some parameters into Application B. Without the MessageBox, Application A throws a TCP 10061 error.

Another point of interest, is there any easy way to debug WCF connections? I have access to the source of both applications, but I'm not sure if it is possible to have Application A launch Application B with the debugger (instead of just the executable). This would help immensely.

EDIT: Was playing around a bit more... found that if I use an Application.DoEvents() instead of a messageBox, it's the same result.