Cannot attach the file as database

Cannot attach the file as database这个异常是在EF的code frist里经常出现的，解决方法很简单，只要重新启动一下V11实例即可。

 CMD> sqllocaldb.exe stop v11.0
    LocalDB instance "v11.0" stopped.

    CMD>
    CMD> sqllocaldb.exe delete v11.0
    LocalDB instance "v11.0" deleted.

    CMD> sqllocaldb.exe start v11.0
    LocalDB instance "v11.0" started.
时间： 2024-08-07 08:20:23

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