一个C#中浅复制(shallow copy)/深复制(deep copy)的例子

[Serializable]
        public class User : ICloneable
        {
            public string name;
            public string desc;
            public string remark;

            public User()
            { }

            protected User(User u)
            {
                name = u.name;
                desc = u.desc;
                remark = u.remark;
            }

            object ICloneable.Clone()
            {
                return base.MemberwiseClone();
            }

            public User Clone()
            {
                return base.MemberwiseClone() as User;
                //return new User(this);
            }

            public User Clone(bool IsDeepCopy)
            {
                using (MemoryStream ms = new MemoryStream(1000))
                {
                    BinaryFormatter bf = new BinaryFormatter(null, new StreamingContext(StreamingContextStates.Clone));
                    bf.Serialize(ms, this);
                    ms.Seek(0, SeekOrigin.Begin);
                    User u = bf.Deserialize(ms) as User;
                    ms.Close();
                    return u;
                }
            }    
        }

        public class Guest : User
        {
            public string IPAddress;

            public Guest()
            { }

            public Guest(User u)
                : base(u)
            {}

            public Guest(Guest g)
                : base(g)
            {
                IPAddress = g.IPAddress;
            }
        }

User admin = new User() { name = "admin", desc = "管理员", remark = "管理员" };
            User admin1 = new User() { name = "admin1", desc = "管理员", remark = "管理员" };

            /*问题1：如果大多数属性一样，只有一个属性不一样。我想直接复制对象里的属性，然后再修改不一样的属性，
            我可以这样写吗？如下： 
            User admin2 = admin;
            admin2.name = "admin2";*/

            User admin2 = admin.Clone();
            admin2.name = "admin2";

            /*问题二：我现在想通过子类去复制父类的属性，然后再增加自己的属性，可以吗？比如：
            User guest = new User() { name = "guste", desc = "游客", remark = "游客" };
            Guest guest1 = guest;
            guest1.IPAddress = "192.168.168.3";
            Guest guest2 = guest;
            guest1.IPAddress = "192.168.168.5";*/

            User guest = new User() { name = "guste", desc = "游客", remark = "游客" };
            Guest guest1 = new Guest( guest);
            guest1.name = "guest1";
            guest1.IPAddress = "192.168.168.3";            
            Guest guest2 = new Guest(guest);
            guest2.name = "guest2";
            guest2.IPAddress = "192.168.168.5";