C# Basics Exam 10 April 2014 Morning - 04. Nine Digit Magic

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            int sum = Convert.ToInt32(Console.ReadLine());
            int diff = Convert.ToInt32(Console.ReadLine());
            bool isMagic = false;
            for (int a = 1; a < 8; a++)
            {
                for (int b = 1; b < 8; b++)
                {
                    for (int c = 1; c < 8; c++)
                    {
                        for (int d = 1; d < 8; d++)
                        {
                            for (int e = 1; e < 8; e++)
                            {
                                for (int f = 1; f < 8; f++)
                                {
                                    for (int g = 1; g < 8; g++)
                                    {
                                        for (int h = 1; h < 8; h++)
                                        {
                                            for (int i = 1; i < 8; i++)
                                            {
                                                int num1 = 100 * (a) + 10 * (b) + c;
                                                int num2 = 100 * (d) + 10 * (e) + f;
                                                int num3 = 100 * (g) + 10 * (h) + i;
                                                int sum1 = a + b + c + d + e + f + g + h + i;
                                                if (sum1 == sum && num3 - num2 == diff && num2 - num1 == diff && num1<num2 && num2<num3)
                                                {
                                                    isMagic = true;
                                                    Console.Write(num1);
                                                    Console.Write(num2);
                                                    Console.WriteLine(num3);

                                                }
                                            }

                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
            if (isMagic != true)
            {
                Console.WriteLine("No");
            }
            Console.ReadLine();
        }
    }
}