Failed to open a connection to SQL Server.
I have found a problem on using Microsoft Virtual Studio. It has failed to open a connection to SQL Server. The error message is given below:
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: Named Pipes Provider, error: 40 – Could not open a connection to SQL Server)
The image of error message is here:
How can the problem be solved?