[你必须知道的.Net]读书笔记--浅clone与深clone

using  System;
using  System.Collections.Generic;

namespace  CloneTest
{
     class  Program
    {
         static   void  Main( string [] args)
        {          

            Enrollment sourceStudentsList  =   new  Enrollment();
            sourceStudentsList.students.Add( new  Student() { Name  =   " 王小二 " , Age  =   27  });
            sourceStudentsList.students.Add( new  Student() { Name  =   " 张三 " , Age  =   22  });


            Enrollment cloneStudentsList  =  sourceStudentsList.Clone()  as  Enrollment;

            sourceStudentsList.ShowEnrollmentInfo( " source " );
            Console.WriteLine( " ---------------------------------------------------------------- " );
            cloneStudentsList.ShowEnrollmentInfo( " clone " );

            cloneStudentsList.students[ 1 ].Name  =   " 李四 " ;
            cloneStudentsList.students[ 1 ].Age  =   36 ;
            
            Console.WriteLine( " ---------------------------------------------------------------- " );
            Console.WriteLine( " 深clone之后，修改clone对象不影响source对象 " );
            Console.WriteLine( " ---------------------------------------------------------------- " );
            sourceStudentsList.ShowEnrollmentInfo( " source " );
            Console.WriteLine( " ---------------------------------------------------------------- " );
            cloneStudentsList.ShowEnrollmentInfo( " clone " );

            Console.ReadLine();
        }
    }


     class  Student
    {
         public   string  Name {  set ;  get ; }
         public  Int32 Age {  set ;  get ; }
       

         public   void  ShowInfo()
        {
            Console.WriteLine( " {0}'s age is {1} " , Name, Age);
        }
    }


     class  Enrollment : ICloneable 
    {
         public  List < Student >  students  =   new  List < Student > ();

         public   void  ShowEnrollmentInfo( string  Prefix) {
            Console.WriteLine(Prefix  +   "  Students enrollment infomation： " );
             foreach  (Student s  in  students)
            {
                s.ShowInfo();
            }
        }

         // 提供一个默认的公有构架函数，以保证Enrollment sourceStudentsList = new Enrollment();能正常编译通过
         public  Enrollment() { }

         ///   <summary>
         ///  提供了一个私有构造函数
         ///   </summary>
         ///   <param name="studentList"></param>
         private  Enrollment(List < Student >  studentList) 
        {
             foreach  (Student s  in  studentList)
            {
                students.Add( new  Student() { Name  =  s.Name, Age  =  s.Age }); // 注：原书P309的代码students.Add((Student)s.Clone());编译通不过--提示Student没有Clone方法，所以换成了这个
            }
        }

         public   object  Clone() {
             return   new  Enrollment(students);
        }
    }
}