I’ve got a problem with fresh install of SQL Server.
ConnectinString:
Data Source=(local);Initial Catalog=SGGW.USS;Integrated Security=SSPI;Pooling=false
but this works
Data Source=.\EOGSQL;Initial Catalog=SGGW.USS;Integrated Security=SSPI;Pooling=false
EOGSQL is my local machine only running SqlServer Database
EOG
You have a Named Instance, so the connection string must be MachineName\InstanceName, or ip instead of machine name for that matter.