Windows authentication database connection, sql verification

windows authentication: "server = .; database = Northwind; Integrated Security = True;"

sql verification: "server = .; database = Northwind; uid = sa; pwd =;"

You can also use the following code:

windows authentication: "Data Source = .; Initial Catalog = Northwind; Integrated Security = True;"

sql验证："Data Source=.;Initial Catalog=Northwind;User ID=sa;Password=;"