using System;

​

namespace Example

{

    class Ref<T>

    {

        public T Value { get; set; }

​

        public Ref(T item)

        {

            Value = item;

        }

​

        public override string ToString()

        {

            return Value.ToString();

        }

​

        public static implicit operator T(Ref<T> source)

        {

            return source.Value;

        }

    }

​

    class Foo

    {

        public string Text { get; private set; }

​

        public Foo(string text)

        {

            this.Text = text;

        }

​

        public override string ToString()

        {

            return this.Text;

        }

    }

​

    public class Program

    {

        static Ref<Foo> Container = new Ref<Foo>(null);

​

        static void MyMethod(Ref<Foo> thisArg) 

        {

            Action action = () => thisArg.Value = new Foo("After");

            action();

        }

​

        public static void Main()

        {

            Container.Value = new Foo("Before");

            MyMethod(Container);

            Console.WriteLine("Value after call is: {0}", Container);

        }

    }

}