public static void Main()
Console.WriteLine("x = {0} y = {1} z = {2} Age ={3}", 123 , "456" , "ABC", Age);
Console.WriteLine("123456789");
Console.WriteLine("{0,9}", 123);
Console.WriteLine("123456789");
Console.WriteLine("{0,9}End", 123);
Console.WriteLine("123456789123456789");