User Instance of SqlLocalDb
问题 I am getting this Exception When I am trying to access database from C#. My Connection String is Data Source=(localdb)\v11.0;integrated security=true;User Instance = true;AttachDbFileName=C:\Users\UserName\Desktop\DB\TestDB3.mdf Exception is The user instance login flag is not allowed when connecting to a user instance of SQL Server. The connection will be closed. 回答1: LocalDB instances are all "User Instances", and there's no need to specify User Instance=true in your connection string, in