两个List的交集,补集

用linq是很好实现的

using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace ConsoleProgram { class Program { static void Main(string[] args) { var oneList = new List<int>(); var twoList = new List<int>(); oneList.Add(1); oneList.Add(2); oneList.Add(3); twoList.Add(1); twoList.Add(2); twoList.Add(3); twoList.Add(4); //where (from o in oneList select o).Contains(i) 包含 //where !(from o in oneList select o).Contains(i) 不包含 var searchResult = from i in twoList where !(from o in oneList select o).Contains(i) select i; //打印到屏幕 foreach (int num in searchResult) { Console.Write(num); } Console.Read(); } } }