using System;

​

public class Program

{

    public static void Main()

    {

        int x = 1;

        int y = 2;

        // specifying parameter types

        SwapValue<int>(ref x, ref y);

​

​

        // without specifying parameter types

        SwapValue(ref x, ref y);

        //string first = "Joe";

        //string last = "Smith";

        //SwapValue<string>(ref first, ref last);

        //Console.WriteLine("x={0}, y={1}",first, last);

        Console.WriteLine("x={0}, y={1}",x,y);

    }

​

​

​

    // generic method with a contraint

    static void SwapValue<T>(ref T x, ref T y) where T : struct

    {

        Console.WriteLine("Generic method used.");

        T temp;

        temp = x;

        x = y;

        y = temp;

    }

​

    // overriden SwapValue specialized for int

    static void SwapValue(ref int x, ref int y)

    {

        Console.WriteLine("Non generic method used");

        int temp;

        temp = x;

        x = y;

        y = temp;

    }

}