C#比较两个list集合，两集合同时存在或A集合存在B集合中无

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    using System;      using System.Collections.Generic;      using System.Linq;      using System.Text;      using System.Threading;      using System.Threading.Tasks;            namespace Sample3      {          class Program          {              static void Main(string[] args)              {                  var student1 = new List<student>();                  student1.Add(new student() { name = "张三", subject = "英语", score = 89 });                  student1.Add(new student() { name = "李四", subject = "英语", score = 95 });                  student1.Add(new student() { name = "王五", subject = "英语", score = 69 });                  student1.Add(new student() { name = "李倩", subject = "英语", score = 99 });                        var student2 = new List<student>();                  student2.Add(new student() { name = "李四", subject = "英语", score = 95 });                  student2.Add(new student() { name = "王五", subject = "数学", score = 69 });                  student2.Add(new student() { name = "赵六", subject = "数学", score = 100 });                        //var exp1 = student1.Where(a => student2.Any(t => a.name.Contains(t.name))).ToList();                  //使用Exists同样可以实现 字面上应该更好理解，而且效率要高些                  var exp1 = student1.Where(a => student2.Exists(t => a.name.Contains(t.name))).ToList();                  Console.WriteLine("--查找student1和student2总同时存在的数据--");                  foreach (var item in exp1)                  {                      Console.WriteLine("{0} \t {1} \t {2}", item.name, item.subject, item.score);                  }                        //var exp2 = student1.Where(a => student2.All(t => !a.name.Contains(t.name))).ToList();                    //使用Exists同样可以实现 字面上应该更好理解，而且效率要高些                  var exp2 = student1.Where(a => !student2.Exists(t => a.name.Contains(t.name))).ToList();                  Console.WriteLine("--查找student1集合中存在，而student2不存在的数据--");                  foreach (var item in exp2)                  {                      Console.WriteLine("{0} \t {1} \t {2}", item.name, item.subject, item.score);                  }                  Console.Read();                        /*                     --查找student1和student2总同时存在的数据--                     李四     英语    95                     王五     英语    69                     --查找student1集合中存在，而student2不存在的数据--                     张三     英语    89                     李倩     英语    99                   */              }          }                public class student          {              /// <summary>                /// 姓名                /// </summary>                public string name;              /// <summary>                /// 科目                /// </summary>                public string subject;              /// <summary>                /// 分数                /// </summary>                public int score;          }        }
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