using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        List<Action> thingsToDo = new List<Action>() { DoThing1, DoThing2, DoThing3 };

        var myRand = new Random();

        var randThing = myRand.Next(thingsToDo.Count);

        thingsToDo[randThing]();

    }

    private static void DoThing1()

    {

        Console.WriteLine("Thing 1");

    }

    private static void DoThing2()

    {

        Console.WriteLine("Thing 2");

    }

    private static void DoThing3()

    {

        Console.WriteLine("Thing 3");

    }

}