using System; using System.Collections.Generic; using System.Linq; namespace Linqmethods2 { class Program { static void Main(string[] args) { List<int> series = new List<int>(); series.AddRange(Enumerable.Range(1, 20)); var squares = series.Select(a=>a*a).ToList(); foreach (int i in squares) { Console.WriteLine(i); } Console.WriteLine("The sum of the two"); List<int> lone = new List<int>{1,5,6,3,2}; List<int> ltwo = new List...