static void Main(string[] args) { int a = 10; SqlConnection conn = new SqlConnection("Data Source=BLR-BMCZ7Q2-D;Initial Catalog=CareNotesDevLocal510;UID=sa;Password=W3lc0m3"); conn.Open(); Class1.Simplemethod(ref conn, a); if (conn.State == ConnectionState.Open) { Console.WriteLine("connection successful"); } else { Console.WriteLine("not connected"); } Console.WriteLine(" this is calling method A" + a); Console.ReadKey(); }