這屬於vs2010的bug,如下是微軟官方對些問題的迴應:
i am still investigating the problem, but looks like the issue is caused by .filters file showing in the solution explorer (normally it should not be there). as a workaround, please go to tools - options - projects and solutions - vc++ project settings and add .vcxproj and .filters to extentions to hide there.
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