C# Groupby 按年龄段分组实现

工作笔记

 patientGroup = testPatients.ToList().GroupBy(item =>
                                {
                                    switch (item.Age / 10)
                                    {
                                        case 0:
                                            return "0-10";
                                        case 1:
                                            return "10-20";
                                        case 2:
                                            return "20-30";
                                        case 3:
                                            return "30-40";
                                        case 4:
                                            return "40-50";
                                        case 5:
                                            return "50-60";
                                        default:
                                            return "60+";

                                    }
                                }).ToList();