How to know details of System.InvalidOperationException in System.Windows.Forms.dll?

Question

When running my application, I found exception log below in Output panel of Visual Studio.

A first chance exception of type 'System.InvalidOperationException' occurred in System.Windows.Forms.dll

This application's architect is as follows.

• Second thread: Enqueue "add item to listview" or "change item to listview" command into a queue.
• Main thread: Dequeue from a queue and execute add or change operation defined by each command.

I want to know details of InvalidOperationException called from, but it's only shown on Output panel, so I can't catch it for viewing stack trace. Is there a way to know it?

Answer 1

The best way to find where an exception like this is being triggered is to set the debugger to break on all exceptions.

You can do this by going to the Exception Settings window and checking the checkbox next to Common Language Runtime Exceptions under 'Break When Thrown'.

If you don't see the Exception Settings window, you can open it from the top menu at Debug -> Windows -> Exception Settings (there's also a keyboard shortcut of Ctrl+Alt+E to open it.

This will break anytime a .NET exception is thrown, regardless of where or whether it's handled.

This won't fix your problem, but it'll help identify it.