错误 2902 类型“Microsoft.Windows.Design.PropertyEditing.PropertyValue”同时存在于“c:\Program Files\Microsoft Visual Studio 9.0\Common7\IDE\PublicAssemblies\Microsoft.Windows.Design.dll”和“c:\Program”中文件\Microsoft Visual Studio 10.0\Common7\IDE\PublicAssemblies\Microsoft.Windows.Design.Interaction.dll'
我该如何解决？