using System;

​

​

public class Bar

{

    public Func<int, int> foo;

    public Bar()

    {

        this.foo = x => (x * 2);

    }

​

}

​

public class Program

{

​

    public static void Main()

    {

        var a = new Bar();

        Console.WriteLine(a.foo(5));

    }

}

​