linq Concat

public static void Concat()
        {
            int[] numbersA = { 0, 2, 4, 5, 6, 8, 9 };
            int[] numbersB = { 1, 3, 5, 7, 8 };

            var allNumbers = numbersA.Concat(numbersB);

            Console.WriteLine("All numbers from both arrays:");
            foreach (var n in allNumbers)
            {
                Console.WriteLine("{0}", n);
            }
        }

Output