Demo of compilation of stupid code

PureObjectOrientedWorld.cs

using System;

namespace test
{
    class PureObjectOrientedWorld
    {
        static void Main(string[] args)
        {
            var p = new PureObjectOrientedWorld();
            p.Test(5, 12, 12);
            p.Test(13, 6, 13);
        }

        void Test(int a, int b, int expectedResult)
        {
            var actual = max(a, b);
            if (actual == expectedResult)
                Console.WriteLine("Test passed.");
            else
                Console.WriteLine("Test failed.");
        }

        // "pure object-oriented world"
        public int max(int a, int b)
        {
            return new If(
                new GreaterThan(a, b),
                a, b
                );
        }

        interface IComparison
        {
            bool Evaluate();
        }

        public class GreaterThan : IComparison
        {
            public GreaterThan(int left, int right)
            {
                Result = left > right;
            }
            public readonly bool Result;

            bool IComparison.Evaluate()
            {
                return Result;
            }
        }

        class If
        {
            public If(IComparison c, int trueResult, int falseResult)
            {
                if (c.Evaluate())
                    Result = trueResult;
                else
                    Result = falseResult;
            }
            public readonly int Result;
            public static implicit operator int(If i)
            {
                return i.Result;
            }
        }
    }
}