连接两个字典 [英] Concatenate two Dictionaries

问题描述

提供一些字典

Dictionary<string, string> GroupNames = new Dictionary<string, string>();
Dictionary<string, string> AddedGroupNames = new Dictionary<string, string>();

我无法将它们合并为一个:

I am unable to merge them into one:

GroupNames = GroupNames.Concat(AddedGroupNames);

因为无法隐式转换类型".我相信(并且我的代码证明我是对的)它们的类型相同-我忽略了什么?

because "the type can't be implicitly converted". I believe (and my code proves me true) their type is the same - what am I overlooking?

推荐答案

我认为您已将GroupNames定义为Dictionary<string,string>，因此您需要像这样添加ToDictionary:

I think you defined your GroupNames as Dictionary<string,string>, so you need to add ToDictionary like this:

GroupNames = GroupNames.Concat(AddedGroupNames)
                       .ToDictionary(x=>x.Key,x=>x.Value);

请注意，两个原始词典将具有不同的键，否则我们需要一些规则来正确合并它们.

Note that 2 original dictionaries would have different keys, otherwise we need some rule to merge them correctly.

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