using System; using System.Collections; using System.Collections.Generic; using System.Text; using System.Linq; public class MainClass{ public static void Main(){ int[] numbers = { 1, 2, 3, 4, 5, 6, 7, 8, 9 }; int[] moreNumbers = { 10, 11, 12, 13 }; var query = numbers.Concat(moreNumbers); } }