异常处理：Cannot attach the file as database 'membership'.

 Cannot attach the file 'D:\GitHome\cae\CAE\App_Data\membership.mdf' as database 'membership'.
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异常详细信息: System.Data.SqlClient.SqlException: Cannot attach the file 'D:\GitHome\cae\CAE\App_Data\membership.mdf' as database 'membersh Cannot attach the file 'D:\GitHome\cae\CAE