using System;

public class Program

{

    public static void Main()

    {

        var myStringVar = "Smith";

        Func<string> returnMyString = () => MyMethod(ref myStringVar);

        Console.WriteLine(returnMyString());

        myStringVar = "Jones";

        Console.WriteLine(returnMyString());

    }

    public static string MyMethod(ref string myStringVar)

    {

        return myStringVar;

    }

}