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, 3, 5, 4}; var query = numbers.TakeWhile(( n, index) => n >= index); var query2 = numbers.SkipWhile(( n, index) => n >= index); } }