Clone()方法C#

class DrawBase:System.Object , ICloneable

{

public string name = "jmj";

public DrawBase()

{

}

public object Clone()

{

return this as object; //引用同一个对象

return this.MemberwiseClone(); //浅复制

return new DrawBase() as object;//深复制

}

}

class Program

{

static void Main(string[] args)

{

DrawBase rect = new DrawBase();

Console.WriteLine(rect.name);

DrawBase line = rect.Clone() as DrawBase;

line.name = "a9fs3";

Console.WriteLine(rect.name);

DrawBase ploy = line.Clone() as DrawBase;

ploy.name = "lj";

Console.WriteLine(rect.name);

Console.WriteLine(object.ReferenceEquals(line, ploy));

Console.ReadLine();

}

}

运行结果：

return this as object; //引用同一个对象

输出：jmj

a9fs3

lj

True

return this.MemberwiseClone(); //浅复制

return new DrawBase() as object;//深复制

输出均为: jmj

jmj

jmj

False

解释：

return this as object 方法总是引用同一个对象，因此相应的堆内存上的值会改变！

后两种方法都是对对象的复制，区别在于复制的类别不同：深复制会复制整个填充的对象，包括该对象中其他引用类型和值类型的值；而浅复制只复制了一个对象中所有引用，它没有值的复制，通过引用它们的其他对象的引用来共享它们。