SQL Server Instance not showing in Visual Studio while connection

Question

When I add a new connection in visual studio, then in the server name it is not showing a-9\MSSQLSERVER, it shows a-9\sqlexpress and a-9\new but I want to connect to MSSQLSERVER.

But when I change the data source to Microsoft ODBC Data Source then it shows the instance MSSQLSERVER.

But when I choose Data Source as "Microsoft SQL Server Database File (SqlClient)" or "Microsoft SQL Server (SqlClient)" then it gives error "Network related instance error."

Answer 1

It turns out there is something called SQL SERVER DATA TOOLS 2012. If I add my SQL Server to this tool than it appears in the Server Explorer in Visual Studio 2012. This solved my problem.