这篇文章主要介绍“怎么用lambda表达式进行对象结合操作”，在日常操作中，相信很多人在怎么用lambda表达式进行对象结合操作问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答”怎么用lambda表达式进行对象结合操作”的疑惑有所帮助！接下来，请跟着小编一起来学习吧！
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1publicclass Person : BaseDomain
2 {
3long _id;
4string firstName;
5string secondName;
6string comments;
7 8public Person()
9 {}
1011public Person(long id)
12 {
13this._id = id;
14 }
15public Person(long id,string firstName, string secondName)
16 {
17this._id = id;
18this.firstName = firstName;
19this.secondName = secondName;
20 comments = String.Empty;
21 }
22public Person(long id,string firstName, string secondName, string comments)
23 : this(id,firstName, secondName)
24 {
25this.comments = comments;
26 }
2728publicstring FirstName
29 {
30get { return firstName; }
31set { firstName = value; }
32 }
33publicstring SecondName
34 {
35get { return secondName; }
36set { secondName = value; }
37 }
38publicstring Comments
39 {
40get { return comments; }
41set { comments = value; }
42 }
43publicoverridestring ToString()
44 {
45returnstring.Format("FirstName: {0}\tSecondName: {1}\tComment: {2}", this.firstName, this.secondName, this.comments);
46 }
47 }上面是测试需要的简单类型：Person
1var list = new List(5); 2 list.Add(new Person(1,"咬金","程","拿斧子砍人的那个家伙"); 3 list.Add(new Person(2,"咬金","程","拿斧子砍人的那个家伙"); 4 list.Add(new Person(3,"貂蝉","王","3技能很厉害哦"); 5 list.Add(new Person(4,"昭君","李","适合打团战"); 6 list.Add(new Person(5,"亚瑟","毛","狠狠厚的肉")； 7 8//进行去重操作，需要先引入linq引用"using System.Linq; " 9var result_list = list.GroupBy(obj=>obj.FirstName).Select(g=>g.First()).ToList(); 1011foreach(var item in result_list) 12 { 13 Console.WriteLine(item); 14 }
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