C# List 排序用法与比较

新建一个实体类

    public class People    {        public string name { get; set; }        public int age { get; set; }        public string sex { get; set; }    }

新建list的数据

            List<People> peoples = new List<People>()            {                new People() {age = 11, name="alun", sex = "男"},                new People() {age=25, name = "陈", sex = "男"},                new People() {age=9, name = "惠", sex = "男"},                new People() {age = 45, name = "小", sex = "女"},                new People() {age=3, name = "晓", sex = "女"},                new People() {age=70, name = "王", sex = "男"}            };

 1. 第1种排序方法，使用 IComparer

    public class PeopleAgeComparer : IComparer<People>    {        public int Compare(People p1, People p2)        {            return p1.age.CompareTo(p2.age);        }    }peoples.Sort(new PeopleAgeComparer());

第一种方法比价麻烦，而且还要创建一个新的类。

2. 第2种排序方法，使用委托来排序

peoples.Sort(delegate (People p1, People p2) { return p1.age.CompareTo(p2.age); });

委托的方式很方便，并且不用新建类这么麻烦。

3. 第3种排序方法，使用Lambda表达式来排序

peoples.Sort( (a, b) => a.age.CompareTo(b.age) );

 这3种方法，个人觉得还是Lambda表达式使用得方便。