list group by 问题咨询
var ls2 = new List<Dictionary<string, int>>();
ls2.Add(new Dictionary<string, int>
{
{"a",1},
{"b",2}
});
ls2.Add(new Dictionary<string, int>
{
{"a",3},
{"c",4}
});
ls2.Add(new Dictionary<string, int>
{
{"a",1},
{"c",5}
});
请问,有什么linq或者快方法可以得出 ls2 下group by key=a 时 value 得到 1,3 ?