Visual Studio 2010 bug in using controls!

I create a C# windows form application in visual studio 2010. I create some controls and darg them into my main form. Every time I change the controls, building of the project faild because the exe (output) file is locked (there is no any syntax error). After above error I have to close VS and reopen the project.

My question is I make mistake or visual studio has a bug in开发者_运维百科 this situation?

Thanks.

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Is the executable running from the Debug or Release directory? You can't recompile it if the output is running, then Visual Studio won't be able to replace it.