这个Linq如何GroupBy

Question

var query = from lp in  List.Select(l=>l.Sort().ToArray())
                    group lp by new {lp[0],lp[1],lp[2]} into g
                    select g

Answer 1

List<List<string>> list = new List<List<string>>() 
            { 
                new List<string>(){"1","2","3"},
                new List<string>(){"2","1","3"},
                new List<string>(){"1","5","5"},
                new List<string>(){"5","1","5"},
                new List<string>(){"1","1","5"},
            };
            var query = from l in list.Select(t => t.OrderBy(m => m).ToList()).ToList()
                        group l by new { L1 = l[0], L2 = l[1], L3 = l[2] } into g
                        select g;
在VS里敲了一遍，手写的不对

Answer 2

List<List<string>> list = new List<List<string>>() 
            { 
                new List<string>(){"1","2","3"},
                new List<string>(){"2","1","3"},
                new List<string>(){"1","5","5"},
                new List<string>(){"5","1","5"},
                new List<string>(){"1","1","5"},
            };            var counts = list.Select(t => t.OrderBy(m => m).ToList()).GroupBy((l) => new { L1 = l[0], L2 = l[1], L3 = l[2] })
                .Select(g => new { Key = g.Key, Count = g.Count() });你再要就没有了