C#中怎么使用Intersect自定义对象列表

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筋斗云
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在C#中使用Intersect方法对自定义对象列表进行交集操作,需要重写自定义对象的Equals和GetHashCode方法,以确保比较两个对象是否相等的准确性。

假设有一个自定义对象Person,包含属性Id和Name,示例代码如下:

public class Person {     public int Id { get; set; }     public string Name { get; set; }      public override bool Equals(object obj)     {         if (obj == null || GetType() != obj.GetType())         {             return false;         }          Person other = (Person)obj;         return Id == other.Id && Name == other.Name;     }      public override int GetHashCode()     {         return Id.GetHashCode() ^ Name.GetHashCode();     } } 

然后创建两个Person对象列表,使用Intersect方法找到它们的交集:

List<Person> list1 = new List<Person> {     new Person { Id = 1, Name = "Alice" },     new Person { Id = 2, Name = "Bob" },     new Person { Id = 3, Name = "Charlie" } };  List<Person> list2 = new List<Person> {     new Person { Id = 2, Name = "Bob" },     new Person { Id = 3, Name = "Charlie" },     new Person { Id = 4, Name = "David" } };  var intersectList = list1.Intersect(list2).ToList();  foreach (var person in intersectList) {     Console.WriteLine(person.Id + " " + person.Name); } 

以上代码将输出:

2 Bob 3 Charlie 

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