我有两个列表，我需要对它们进行比较，并只返回的项目列表不同时。

I got two lists and I need to compare them and only return a List of Items not in both.

var listOfIds = new List<int> {1,2,4};

var persons = new ObservableCollection<Person>
   {
            new Person {Id = 1, Name = "Person 1"},
            new Person {Id = 2, Name = "Person 2"},
            new Person {Id = 3, Name = "Person 3"},
            new Person {Id = 4, Name = "Person 4"}
   };

在这个例子中新的Person {n = 3，名称=3人} 会是这个结果。 LINQ的解决方案将是preferred。

In this example new Person {Id = 3, Name = "Person 3"} would be the result. A Linq solution would be preferred.

推荐答案

不是会为你工作。

var listOfIds = new List<int> {1,2,4};

var query = from item in persons 
            where !listOfIds .Contains( item.id )
            select item;

您可以检查更多的细节： SQL中的LINQ（案例7 - 过滤器通过使用和NOT IN子句的数据）

You can check for more detail : SQL to LINQ ( Case 7 - Filter data by using IN and NOT IN clause)