SomethingBroken

using System.Numerics;
using System.Threading;

namespace StrangeThing
{
    class GCD3
    {
        class Num
        {
            public BigInteger v;
            public Num(BigInteger a)
            {
                v = a;
            }

            public override string ToString()
            {
                return v.ToString();
            }
        }

        private Num A, B, C;
        public readonly BigInteger result;

        public GCD3(BigInteger a, BigInteger b, BigInteger c)
        {
            A = new Num(a);
            B = new Num(b);
            C = new Num(c);

            var t1 = new Thread(() =>
                {
                    while (true)
                    {
                        var x = A;
                        var y = B;
                        if (x.v == 0 || y.v == 0 || x.v == y.v)
                        {
                            break;
                        }
                        if (x.v < y.v)
                        {
                            B = new Num(y.v % x.v);
                        }
                        else
                        {
                            A = new Num(x.v % y.v);
                        }
                    }
                });
            var t2 = new Thread(() =>
            {
                while (true)
                {
                    var y = B;
                    var z = C;
                    if (y.v == 0 || z.v == 0 || y.v == z.v)
                    {
                        break;
                    }
                    if (y.v < z.v)
                    {
                        C = new Num(z.v % y.v);
                    }
                    else
                    {
                        B = new Num(y.v % z.v);
                    }
                }
            });
            var t3 = new Thread(() =>
            {
                while (true)
                {
                    var x = A;
                    var z = C;
                    if (x.v == 0 || z.v == 0 || x.v == z.v)
                    {
                        break;
                    }
                    if (x.v < z.v)
                    {
                        C = new Num(z.v % x.v);
                    }
                    else
                    {
                        A = new Num(x.v % z.v);
                    }
                }
            });
            t1.Start();
            t2.Start();
            t3.Start();

            t1.Join();
            t2.Join();
            t3.Join();

            result = BigInteger.Max(BigInteger.Max(A.v, B.v), C.v);
        }
    }
}


using System;

namespace StrangeThing
{
    class Program
    {
        static void Main()
        {
            Console.WriteLine("Hello");
            //Console.WriteLine(new GCD3(5, 100, 20).result);

            Console.ReadKey();
        }
    }
}