using System;

public class Program

{

    public static void Main()

    {

      int result= PerformCalcFunc<int>(Multiply, 5, 2);

      Console.WriteLine(string.Format("Hello World! Using Func.. result:{0}", result));

​

      PerformCalcAction<int>(MultiplyAction, 5, 2);

}

​

    public static T PerformCalcFunc<T>(Func<T, T, T> operation, T x, T y) 

    {

        T returnVal;

        returnVal = operation(x, y);

        return returnVal;

    }

    private static Func<int, int, int>  Add  = (x, y) => x + y; 

    private static Func<int, int, int>  Substract  = (x, y) => x - y;

    private static Func<int, int, int>  Multiply  = (x, y) => x * y; 

​

    public static void PerformCalcAction<T>(Action<T, T> operation, T x, T y) 

    {

        operation(x, y);

    }

    private static Action<int, int>  AddAction  = (x, y) => Console.WriteLine(string.Format("Hello World! Using Action.. result:{0}", x + y )); 

    private static Action<int, int>  SubstractAction  = (x, y) => Console.WriteLine(string.Format("Hello World! Using Action.. result:{0}", x - y )); 

    private static Action<int, int>  MultiplyAction  = (x, y) => Console.WriteLine(string.Format("Hello World! Using Action.. result:{0}", x * y )); 

​

}