通过添加公共密钥的值来合并两个字典

Question

参考此answer：

public class DictionaryCollection<TType> : Dictionary<string,Dictionary<string,TType>> {
    public void Add(string dictionaryKey,string key, TType value) {

        if(!ContainsKey(dictionaryKey))
            Add(dictionaryKey,new Dictionary<string, TType>());

        this[dictionaryKey].Add(key,value);
    }

    public TType Get(string dictionaryKey,string key) {
        return this[dictionaryKey][key];
    }
}

如何通过单独添加它们的值来添加两个（或更多）字典，以使用常见的dictionaryKey和key来获得合并的字典？

例如：

var dictionary1 = new DictionaryCollection<int>
                                       {
                                           {"dic1", "Key1", 1},
                                           {"dic1", "Key2", 2},
                                           {"dic1", "Key3", 3},
                                           {"dic2", "Key1", 1}
                                       };

var dictionary2 = new DictionaryCollection<int>
                                       {
                                           {"dic1", "Key1", 1},
                                           {"dic1", "Key2", 2},
                                           {"dic1", "Key3", 3},

                                       };

合并的字典应为：

mergedDictionary =  { {"dic1", "Key1", 2},
                      {"dic1", "Key2", 4},
                      {"dic1", "Key3", 6},
                      {"dic2", "Key1", 1}
                    };

Answer 1

this帮助了我，也许会帮助您。我用它来合并两个字典（Dictionary<string, string>）

 var _merged = _content.Concat(_l)
                .ToLookup(x => x.Key, x => x.Value)
                .ToDictionary(x => x.Key, g => g.First());