异常

namespace ConsoleApplication3
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                //int a = Convert.ToInt32("abc");
               string m= WrongMsg(280);
               Console.WriteLine(m);
            }
            catch (Exception ex)
            {
                Console.WriteLine("错误消息："+ex.Message+"错误位置："+ex.StackTrace);
            }
            Console.ReadKey();
        }
       static string WrongMsg(int age)
        {
            if (age > 0 && age < 3)
                return "婴幼儿";
            else if (age > 3 && age < 18)
                return "青少年";
            else if (age > 18 && age < 150)
                return "成年人";
            else {
                throw new Exception("外星人");
            }
        }
    }
}