public static void Main()
Console.WriteLine("Enter first number\n");
a = int.Parse(Console.ReadLine());
Console.WriteLine("Enter second number\n");
b = int.Parse(Console.ReadLine());
Console.WriteLine("The numbers before swapping is {0} and {1}\n",a,b);
Console.WriteLine("The numbers after swapping is {0} and {1}\n",a,b);