Sql-server – How to modify the user interface language in SSMS

Please stop using the user instance=true setting. Not only has this feature been deprecated, but what is actually happening here is that Management Studio is firing up a different user instance of SQL Server than the one your application is using, so it is not surprising that you can't see the same thing in both cases.

(Usually, the symptom of this is that someone runs an update from their app, then checks the table in Management Studio, thinking there is a bug but not realizing that the update affected a different copy of the database.)

Create the database on your running SQL Server instance (or attach it there). Then connect to that server the same way, without the User Instance setting, from both SSMS and your app. Lots more information here. Don't create the database every time the application starts - that just sounds horrendously wrong.

SSMS uses port 1434 and the UDP protocol. This has to be allowed on the firewall, too.

Quote:

When SQL Server clients request SQL Server resources, the client network library sends a UDP message to the server using port 1434. SQL Server Browser responds with the TCP/IP port or named pipe of the requested instance. The network library on the client application then completes the connection by sending a request to the server using the port or named pipe of the desired instance.

From here.