Visual studio shows endless messages "Code generation for property 'valueMember' failed."

c# visual-studio designer
Roland picture Roland · Nov 22, 2012 · Viewed 30.6k times · Source

After several days of happily hacking away on this C# app using Visual Studio 2008, I get struck by a barrage of error dialogs showing:

Code generation for property 'valueMember' failed.
Error was: 'Object reference not set to an instance of an object.'

This happens now often when I make a tiny change in the designer, e.g. shift a control a few pixels, and then try to save. Several such error dialogs appear each second, keeping me busy cancelling all those by hammering the Enter key while trying to get alt-F4 to get VS to close.

Eventually I do get VS to close and to save the changes I made. After restarting VS, I do "clean" on the entire project, then "build" and everything works fine, the app runs fine, no problems.

Until I make another slight change in the form designer.

I don't know about any property valueMember in my app.

This makes me crazy, it is a real showstopper for my project. Any help is appreciated.

Answer

Chani Poz picture Chani Poz · Sep 18, 2014

Try to Close and reopen the Visual Studio. maybe it seem silly, but it works!!

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