📅  最后修改于: 2022-03-11 14:49:19.494000             🧑  作者: Mango
Select().GroupBy(x => x.Name.Substring(0,1).ToUpper(),
(alphabet, subList) => new {
Alphabet = alphabet,
SubList = subList.OrderBy(x => x.Name).ToList()
}).OrderBy(x => x.Alphabet);