using System;using System.Collections.Generic;using System.Linq;using System.Text; namespace _61{??? class PropertyTest??? {??????? private int age;??????? PropertyTest(int age)??????? {??????????? this.age = age;??????? }??????? public int Age??????? {??????????? get??????????? {??????????????? return this.age;??????????? }??????????? set??????????? {??????????????? if (value > 0 && value < 100)??????????????? {??????????????????? this.age = value;??????????????? }??????????? }??????? }??? }??? class ReadProperty??? {??????? private string name;??????? ReadProperty(string name)??????? {??????????? this.name = name;??????? }??????? public string Name??????? {??????????? get??????????? {??????????????? return this.name;??????????? }??????? }??? }??? class Program??? {??????? static void Main(string[] args)??????? {??????????? PropertyTest propertyTest=new PropertyTest(23);??????????? propertyTest.Age = 33;??????????? Console.WriteLine("年齡為：{0}", propertyTest.Age);??????????? ReadProperty readProperty=new ReadProperty("張三豐");??????????? Console.WriteLine("姓名為：{0}", readProperty.Name);??????????? Console.ReadLine();??????? }??? }} c#中不是可以聲明屬性嗎？這個(gè)例子是我看的演示程序，為什么運(yùn)行不出來(lái)呢，麻煩高手給看看~~