I have installed visual studio community 2017. Now I want to use database inside my application but i
TITLE: Error
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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) (Microsoft SQL Server, Error: 2)
For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft%20SQL%20Server&EvtSrc=MSSQLServer&EvtID=2&LinkId=20476
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ADDITIONAL INFORMATION:
The system cannot find the file specified
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BUTTONS:
OK
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i Can someone tell me what I an doing wrong ?