using System;

public class Program

{

    // 2 eri oliota

    class Joku {}

    class JokuToinen {}

    public static void Main() {

        Func<int, object> haedata = (id) => {

            var tmp = HaeJostakinJotain(id);

            if(tmp == null) {

                throw new Exception("palautti null");

            }

            return tmp;

        };

        // Hae data ja printtaa

        var blaa = haedata(1234);

        Console.WriteLine(blaa.ToString());

    }

    // Palauttaa ties mitä!

    static object HaeJostakinJotain(int id){

        if      (new Random(id).NextDouble() < 0.3d) return new Joku();

        else if (new Random(id).NextDouble() < 0.6d) return new JokuToinen();

        else return null;

    }

}