c# - 包含在 Linq to Object 中？

Question

我有以下列表：

var list1 = new List<string> {"m1", "m2", "m3"};
var list2 = new List<List<string>> 
    {
        new List<string>{"m1", "m2", "m3"},//1
        new List<string>{"m1", "m2", "m3", "m4", "m5"},//2
        new List<string>{"m4", "m5", "m3", "m45", "m35"},//3
        new List<string>{"m1", "m36", "m43", "m54", "m54"},//4
        new List<string>{"m2", "m4", "m3", "m44", "m55"}//5
    };

list2我想选择包含list1所有元素的每个列表。
我们应该如何以优化的方式来做

Answer 1

您可以使用ExceptandAny方法：

var results = list2.Where(x => !list1.Except(x).Any())

Answer 2

list2.Where(l2 => list1.Intersect(l2).Count()==list1.Count)