C#编写一个控制台应用程序，可根据输入的月份判断所在季节

using System;

namespace sy1_2{
    class Program{
        static void Main(string[] args){
            while (true) {
                Console.WriteLine("请输入月份：");
                Console.WriteLine("退出请输入：13");
                int month = int.Parse(Console.ReadLine());
                switch (month){
                    case 3:
                    case 4:
                    case 5:
                        Console.WriteLine("春季");
                        break;
                    case 6:
                    case 7:
                    case 8:
                        Console.WriteLine("夏季");
                        break;
                    case 9:
                    case 10:
                    case 11:
                        Console.WriteLine("秋季");
                        break;
                    case 12:
                    case 1:
                    case 2:
                        Console.WriteLine("冬季");
                        break;
                    case 13:
                        Console.WriteLine("欢迎下次使用！！");
                        break;
                    default:
                        Console.WriteLine("请输入正确的月份！！");
                        break;
                }
                if (month == 13) break;
            }

        }
    }
}