DEEP CLONE USING ICLONEABLE INTERFACE

.NET objects are of two types: value and reference. Variables of value type objects hold the object bits themselves and have "copy-on-assignment" behavior. Variables of reference (ref) type are actually pointers to memory. That is, when you create a new variable of ref type and assign it to an existing object, you are actually creating another pointer to the same memory.

A deep copy of an object
duplicates everything directly or indirectly referenced by the fields in the
object.It provides a mechanism to duplicate an object using an object's persistence mechanism (IPersistStream).

Example Programe
using System;
public class one{public int a;}
public class two:ICloneable
{
public int b;
public one o=new one();
public two(int a1,int b1)
{
o.a=a1;
b=b1;
}
public void show(){Console.WriteLine(o.a+" "+b);}
public Object Clone()
{
two t=new two(o.a,b);
return t;
}
}
class twoclone
{
public static void Main(string[] args)
{
two t1=new two(1,2);
two t2=(two)t1.Clone();
t1.show();
t2.show();
t1.o.a=5;
t2.b=5;
t1.show();
t2.show();
}
}