namespace ConsoleApp1

{

    class Program

    {

        static void Main(string[] args)

        {

            People tom = new People() ;

            tom.Name =" Tom";

            tom.Age = 18;

            tom.MyPlace = Console.ReadLine();

            Console.WriteLine(tom.MyPlace);

            Console.ReadKey();

         }

    }

public class People

    {

        public string Name;

        public int Age;

        public string MyPlace

        {

            get

            {

                return MyPlace;

            }

            set

            {

                if (value =http://www.mamicode.com/="北京")

                {

                    MyPlace = value;

                }

                else

                {

                    MyPlace = "不符合要求";

                }

            }

        }

}

}

C# 总是在set处抛出 system stack over flow exception的异常是什么原因