摘要：属性 public abstract class Shape { private string myId; public string Id { get {return myId;} set { myId = value; } } }属性是 私有变量的 代言人，存取器. 紧挨着变量声明就好函数重载public abstract class Shape{ public abstract double Area { get; } } public class Squre : Shape{ public override double Area { get{ return mySide * mySi 阅读全文