Visual Studio 2010 Debugger jumps around

I have a simple C# Winforms application. It isn't multi-threaded (yet). When I debug it and step through the code at work, it debugs just as expected with the debug cursor moving line by开发者_StackOverflow line. But when I try doing this at my home computer, it behaves very erratic. The cursor will randomly jump to an unrelated line of code in the middle of another method that hasn't even been called yet etc.

The differences are: At work I use VS2010 Professional, at home I have VS2010 Ultimate At work, I use Win XP, at home I use Win 7 Ultimate At work, its a dual core Athlon, at home a quad core Phenom II

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Your symbols file might not match your source. Try deleteing your /bin folder and rebuilding the solution.

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Make sure that the project configuration is set on Debug (not on Release!):

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If you use other Projects too, make sure to go to Build => Batch Build and check if you build those other projects that you run as well

I'm not sure which one will work for you but you should either tick the Build option or by Modifying Solution Config from Release to build,also you might need to delete your Bin Folder and Build from scratch.Then eiter click on build or do it from Solution Explorer. As shown you can Build other parts of the project and Debugger works rationally again.