尝试清除ComponentModelCache，下次VS启动时会重建缓存.

Try clearing the ComponentModelCache, the cache will rebuild next time VS is launched.

1. 关闭 Visual Studio
2. 删除此文件夹中的所有内容 C:Users [您的用户名] AppDataLocalMicrosoftVisualStudio14.0ComponentModelCache
3. 重启 Visual Studio

1. Close Visual Studio
2. Delete everything in this folder C:Users [your users name] AppDataLocalMicrosoftVisualStudio14.0ComponentModelCache
3. Restart Visual Studio

14.0 适用于 Visual Studio 2015.这也适用于其他版本.

14.0 is for visual studio 2015. This will work for other versions also.