C#-从KeyValuePair列表中删除键重复项并添加值 [英] C# - Remove Key duplicates from KeyValuePair list and add Value

问题描述

我有一个C#的KeyValuePair列表，格式为string,int，并带有示例内容:

I have a KeyValuePair List in C# formatted as string,int with an example content:

mylist[0]=="str1",5
mylist[2]=="str1",8

我想要一些代码来删除其中一项，而在其他项中添加重复值.
就是这样:

I want some code to delete one of the items and to the other add the duplicating values.
So it would be:

mylist[0]=="str1",13

定义代码:

List<KeyValuePair<string, int>> mylist = new List<KeyValuePair<string, int>>();

托马斯，我将尝试用伪代码对其进行解释. 基本上，我要

Thomas, I'll try to explain it in pseudo code. Basically, I want

mylist[x]==samestring,someint
mylist[n]==samestring,otherint

成为:

mylist[m]==samestring,someint+otherint

推荐答案

var newList = myList.GroupBy(x => x.Key)
            .Select(g => new KeyValuePair<string, int>(g.Key, g.Sum(x=>x.Value)))
            .ToList();

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