List<object>进行Distinct()去重

有时我们会对一个list<T>集合里的数据进行去重，C#提供了一个Distinct()方法直接可以点得出来。如果list<T>中的T是个自定义对象时直接对集合Distinct是达不到去重的效果。我们需要新定义一个去重的类并继承IEqualityComparer接口重写Equals和GetHashCode方法，如下Demo

 using System;

 using System.Collections.Generic;

 using System.Linq;

 namespace MyTestCode

 {

     /// <summary>

     /// Description of DistinctDemo.

     /// </summary>

     public class DistinctDemo

     {

         private static List<Student> list;

         public DistinctDemo()

         {

         }

         public static void init()

         {

             list = new List<Student>{

                 new Student{

                     Id=,

                     Name="xiaoming",

                     Age=

                 },

                 new Student{

                     Id=,

                     Name="xiaohong",

                     Age=

                 },

                 new Student{

                     Id=,

                     Name="xiaohong",

                     Age=

                 },

             };

         }

         public void Display()

         {

             list = list.Distinct(new ListDistinct()).ToList();

             foreach (var element in list) {

                 Console.WriteLine(element.Id +"/"+element.Name+"/"+element.Age);

             }

         }

     }

     public class Student

     {

         public int Id{get;set;}

         public string Name{get;set;}

         public int Age{get;set;}

     }

     public class ListDistinct : IEqualityComparer<Student>

     {

         public bool Equals(Student s1,Student s2)

         {

             return (s1.Name == s2.Name);

         }

         public int GetHashCode(Student s)

         {

             return s==null?:s.ToString().GetHashCode();

         }

     }

 }

List<object>进行Distinct()去重的相关教程结束。