using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {   

        Func<double,double,double,double> x = (d1,d2,d3) => {return ((d1 +d2 + d3)/ 3.0) / 209;};

        Func<int,int,int,int> y = (i1,i2,i3) => {return (i1 + i2 + i3)/ 3;};

        var rsDouble = Compute<double>(1.0,2.0,3.0,x);

        Console.WriteLine(rsDouble);

        var rsInt = Compute<int>(1,2,3,y);

        Console.WriteLine(rsInt);

​

    }

    public static T Compute<T>(T a, T b, T c, Func<T,T,T,T> action)

    {

        return action(a,b,c);

    }

}