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Editorial Team
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Asked: 2026-05-16T16:57:47+00:00

I have one background thread I use for processing separately from the GUI, and

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I have one background thread I use for processing separately from the GUI, and everything works fine between the threads. However when I close the application, the program “closes” but does not kill the process. The background thread is keeping the program alive it seems.

I have set “myThreadInstance.IsBackground = true;”, and I thought this would require C# to kill it when it is killed.

I am testing this all in Visual Studio (2010, using .NET 4.0), and after the first build, the rest all fail because the exe is still in use so it cannot overwrite it. Looking in task manager, it is there. Killing Visual Studio releases the vbhost process which releases my exe. Killing my exe’s process, makes vbhost respawn it in a second or two.

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1 Answer

  1. Editorial Team

    Try using Application.Exit(0); in the form_closing/form_closed event.

    Bug: I think this might be a bug. Look at the comments at the bottom of this MSDN page: http://msdn.microsoft.com/en-us/library/system.threading.thread.isbackground.aspx

    Also, try using the BackgroundWorker. Here’s a good description in the VisualStudio Magazine: http://visualstudiomagazine.com/articles/2007/09/01/simplify-background-threads.aspx

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