Question

I want to get sum from the list using generics as like

List<Name,Value> test=new List<Name,Value>();
E.g list contain these element
test.Add(One,5);
test.Add(Second,5);
test.Add(Third,5);
test.Add(One,5);
test.Add(One,5);
test.Add(Second,5);

At the end want to get value as like
Element with One name contain value 15
Element with Second name contain value 10
Element with Third name contain value 5

I don’t want to iterate each element manually.
This is not an exact syntax, it an idea.

Answer 1

do you need something like this

            List<KeyValuePair<string, int>> test = new List<KeyValuePair<string, int>>();
test.Add(new KeyValuePair<string,int>("One",5));
test.Add(new KeyValuePair<string,int>("Second",5));
test.Add(new KeyValuePair<string,int>("Third",5));
test.Add(new KeyValuePair<string,int>("One",5));
test.Add(new KeyValuePair<string,int>("One",5));
test.Add(new KeyValuePair<string,int>("Second",5));

var result = test.GroupBy(r => r.Key).Select(r => new KeyValuePair<string, int>(r.Key, r.Sum(p => p.Value))).ToList();