Project Euler problem #4 solution.

using System;

public class Problem
{
    static void Main()
    {
        int a = 0;
        int b = -1;

        for (int i = 999; i >= 100; i--)
        {
            for (int j = 999; j >= 100; j--)
            {
                a = i * j;

                if ((a == Reverse(a)) && (a > b))
                    b = a;
            }
        }

        Console.WriteLine("\n{0}\n", b);
    }

    static int Reverse(int x)
    {
        int y = 0;

        while (x != 0)
        {
            y *= 10;
            y += x % 10;
            x /= 10;
        }

        return y;
    }
}