.AddSingleton(TestModelSource.GetFactory(OnModelCreating)) .BuildServiceProvider();
.AddSingleton(TestModelSource.GetFactory(OnModelCreating)) .AddSingleton <ILoggerFactory>(TestSqlLoggerFactory)
.AddSingleton(TestModelSource.GetFactory(OnModelCreating)) .BuildServiceProvider();
.AddSingleton(TestModelSource.GetFactory(OnModelCreating)) .AddSingleton <ILoggerFactory>(TestSqlLoggerFactory)