Conectar sql sin base de datos

 Private conex_string As String = "Server=1.1.1.1;Integrated security=SSPI;database=master"

https://learn.microsoft.com/en-us/troubleshoot/developer/visualstudio/csharp/language-compilers/create-sql-server-database-programmatically

https://www.c-sharpcorner.com/article/create-a-sql-server-database-dynamically-in-C-Sharp/