c# - 任何现有的字典> 其中值集合不能包含键

Question

我需要以下内容（为简洁起见，此处使用字符串作为类型）：

MyDictionary : IDictionary<string, List<string>>
{
    private readonly Dictionary<string, List<string>> _collection;
    ...
    // The collection cannot contain the key
    public void Add(string key, List<string> value)
    {
        _collection.Add(key, new List<string>(value.RemoveAll(p => p == key));
    }
}

所以在使用中你可能有：

string myName = "Superstringcheese";
List<string> myFriends = new List<string> {"John", "Jane", "Jerry"};

string yourName = "Someone";
List<string> yourFriends = new List<string> {"John", "Bill", "Ted"};

var myDic = new MyDictionary();

// It's okay that each of us (each key) has some friends that are the same. It's not okay for me to have myself as a friend. The add method would check if the key is contained by the value collection and remove it if necessary.
myDic.Add(myName, myFriends);
myDic.Add(yourName, yourFriends);

在我重新发明任何轮子之前，是否有一个本机集合类型可以做到这一点，或者有人知道流行的实现吗？

Answer 1

好吧，我可以帮助解决这一点：

是否有执行此操作的本机集合类型？

不。