static void Main(string[] args) { MyClass m = new MyClass(); //m.PrintStars("5"); Console.WriteLine("Use the out type to output two value"); m.OutputBody(); Console.WriteLine("======================================="); Console.WriteLine("Use the Tuple to output two value"); m.OutputBody2(); Console.WriteLine("======================================="); Console.WriteLine("Use the more easy Tuple to output two value"); m.OutputBody3(); //need Nuget to install System.ValueTuple var(sum, count) = Calc(new int[] { 1, 2, 3 }); Console.WriteLine(sum); Console.WriteLine(count); Print("6"); Console.ReadKey(); }