问题描述
可能重复：结果
How你做一个深拷贝的对象在.net中（特别是C＃）？
请看看下面（摘自一个C＃的书）在code：
Please have a look at the code below (excerpt from a C# book):
namespace Example
{
class MyClass
{
public int val;
}
struct myStruct
{
public int val;
}
class Program
{
static void Main(string[] args)
{
MyClass objectA = new MyClass();
MyClass objectB = objectA;
objectA.val = 10;
objectB.val = 20;
myStruct structA = new myStruct();
myStruct structB = structA;
structA.val = 30;
structB.val = 40;
Console.WriteLine("objectA.val = {0}", objectA.val);
Console.WriteLine("objectB.val = {0}", objectB.val);
Console.WriteLine("structA.val = {0}", structA.val);
Console.WriteLine("structB.val = {0}", structB.val);
Console.ReadKey();
}
}
}
我理解它产生以下
I understands it produces the output below
objectA.val = 20
objectA.val = 20
structB.val = 30
structB.val = 40
输出我有没有问题，但前两个的最后两行告诉我，对象A 和对象B 都指向了同一个内存块（因为在C＃中，对象是引用类型）。
The last two lines of the output I have no problem with, but the first two tell me that objectA and objectB are pointing to the same memory block (since in C#, objects are reference types).
现在的问题是如何让对象B ，对象A 的副本，以便它指向一个不同的区域记忆。据我所知，想他们的成员分配可能无法正常工作，因为这些成员可能是引用了。那么，如何去让对象B 从对象A 一个完全不同的实体？
The question is how do make objectB, a copy of objectA so that it points to a different area in memory. I understand that trying to assign their members may not work since those members may be references, too. So how do I go about making objectB a completely different entity from objectA?
感谢
推荐答案
有没有内置的方法。你可以有MyClass的贯彻落实 IClonable 接口（但它是那种德precated），或者只写你自己的复制/ Clone方法。在这两种情况下，你必须写一些code。
There is no built-in way. You can have MyClass implement the IClonable interface (but it is sort of deprecated) or just write your own Copy/Clone method. In either case you will have to write some code.
有关大对象，你可以考虑序列化+反序列化（通过一个MemoryStream），只是为了重新使用现有的code。
For big objects you could consider Serialization + Deserialization (through a MemoryStream), just to reuse existing code.
不管是什么方法，仔细思考什么是复制的意思完全相同。它应该有多深，是否有标识字段的除外等。
Whatever the method, think carefully about what "a copy" means exactly. How deep should it go, are there Id fields to be excepted etc.
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