It always says "The solution "foo.sln" is of an unsupported Format and may not open correctly. Do you want to open the solution anyway?" If I click yes, it Shows the solution tree, but when I open a xaml file, it only Displays its xaml text, not the Rendering of the UI.It always says "The solution "foo.sln" is of an
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如何编辑使用VS2012创建的Blend 4中的c＃项目？
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