first chance exception of type 'System.Threading.ThreadAbortException'

Question

Been following this "C# 2D Game Tutorial 2 - Creating the Graphics Engine" the URL - https://www.youtube.com/watch?v=A_2OfHQgEUk

When I close the form I get from the console:

A first chance exception of type 'System.Threading.ThreadAbortException' occurred in System.Drawing.dll
An exception of type 'System.Threading.ThreadAbortException' occurred in System.Drawing.dll but was not handled in user code
The thread '<No Name>' (0x1c18) has exited with code 0 (0x0).
A first chance exception of type 'System.Runtime.InteropServices.ExternalException' occurred in System.Drawing.dll
A first chance exception of type 'System.Runtime.InteropServices.ExternalException' occurred in System.Drawing.dll

......

'side_scroller_game.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Configuration\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Configuration.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
The thread '<Thread Ended>' (0x3554) has exited with code 0 (0x0).

Answer 1

Maybe if you post some code we can help you

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Hope it helps. Spiri

Answer 2

You just closed the form.

That's going to abort any threads it has going.

If you want to avoid seeing those "errors" then devise some way of stopping those threads on window closing.

Otherwise.

You could just ignore them.

By Console, you mean Output window?

It's fairly common to see errors which are of no significance in the output window.

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Hope that helps.

Technet articles: WPF: Layout Lab; All my Technet Articles

Answer 3

Sounds like you closed your form while you have background work being done such as timers or async calls. When the form closed it terminated the threads which trigger the exception. The exception itself is harmless (web apps generate it all the time) but in a well-formed Winforms app you shouldn't see it. I recommend that you handle the OnFormClosing or OnFormClosed and stop/clean up any background work that you're doing. This should eliminate the issue.

Michael Taylor
http://blogs.msmvps.com/p3net