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();
         }
     }
 }