int[] loto=new int[7];

            Random rnd = new Random();

            for (int i = 0; i < 7; i++) 

            {

                int rast = rnd.Next(1,50);

                    for (int j = 0; j < i; j++)

                    {

                        if (loto[i] == rast)

                        {

                            loto[i] = 0;

                            i--;

                            break;

                        }

                    }

                            loto[i] = rast;

            }

            Array.Sort(loto);

            foreach (int sira in loto)

            {

                Console.Write(sira + "  ");

            }

            Console.ReadKey();