i am working in asp.net mvc it gives this error after update-database command when connecting sql
A network-related or instance-specific error occurred while establishing a connection to the server. The server was not found or the server is unreachable. Verify that the instance name is correct and SQL Server allows remote connections. (provider: SQL Network Interfaces, error: 52 - A Local Database Runtime installation was not found. Make sure SQL Server Express is properly installed and the Local Database Runtime feature is enabled.)
"SqlConnection": "Data Source=localhost,1440;Initial Catalog=DbMvcKamp;User ID=sa;Password=Cem090909.;Connect Timeout=30;Encrypt=False;TrustServerCertificate=False;ApplicationIntent=ReadWrite;MultiSubnetFailover=False"