TITLE: Connect to Server

Cannot connect to (LocalDb)\MSSQLLocalDB.

ADDITIONAL INFORMATION:

A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 52 - Unable to locate a Local Database Runtime installation. Verify that SQL Server Express is properly installed and that the Local Database Runtime feature is enabled.) (Microsoft SQL Server, Error: 2)

That's pretty much text you get right out of the Microsoft and a lot of other SQL documentation about this error. I'm looking at your history of posts and it seems you are just dumping errors in your posts without going into detail how you got to this state of affairs. Since this error has many causes without a story, you are just dumping posts here which I see few are replying to.

Try spending more time to create a better quality question.