面向对象的问题，帮忙看看。

Question

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;namespace ConsoleApplication12
{
    class Program
    {
        static void Main(string[] args)
        {
            Authenic simon = new Authenic();
            bool Done = simon.changePassword("wuengfei","MyNewPassWord");
            if (Done == true)
                Console.WriteLine("密码修改失败");
            else
                Console.WriteLine("密码修改成功");
            Console.WriteLine();
        }
    }
    class Authenic
    {
        private string Password = "wupengfei";
        public bool IsPassWordCorrect(string userPassWord)
        {
            return (Password == userPassWord) ? true : false;
        }
        public bool changePassword(string oldPassword, string newPassWord)
        {
            if (oldPassword == Password)
            {
                Password = newPassWord;
                return true;
            }
            else
                return false;
        }
    }
}
程序运行后要输出改了之后的密码是什么，应该在红色部分怎么改？

Answer 1

String NewsPassword="XXXXXXXXXXXX";
Authenic simon = new Authenic(); 
            bool Done = simon.changePassword("wuengfei",NewsPassword); 
            if (Done == true) 
                Console.WriteLine("密码修改失败"); 
            else 
                Console.WriteLine("密码修改成功"); 
            Console.WriteLine(NewsPassword); 

Answer 2

static void Main(string[] args)
        {
            Authenic simon = new Authenic();
            string oldPassWord = "wuengfei";
            string newPassWord = "MyNewPassWord";            bool Done = simon.changePassword(oldPassWord, newPassWord);
            if (Done == true)
            {
                Console.WriteLine("密码修改失败");
                Console.ReadKey();
            }
            else
            {
                Console.WriteLine("密码修改成功");
                Console.WriteLine("新密码是：" + newPassWord);
                Console.ReadKey();
            }        }
        class Authenic
        {
            private string Password = "wupengfei";
            public bool IsPassWordCorrect(string userPassWord)
            {
                return (Password == userPassWord) ? true : false;
            }
            public bool changePassword(string oldPassword, string newPassWord)
            {
                if (oldPassword == Password)
                {
                    Password = newPassWord;
                    return true;
                }
                else
                    return false;
            }
        }

Answer 3

Authenic simon = new Authenic(); 
bool Done = simon.changePassword("wuengfei",newPassWord); 
     if (Done == true) 
        Console.WriteLine("密码修改成功"+newPassWord); 
     else 
          Console.WriteLine("密码修改失败"); 
    Console.WriteLine(); 

Answer 4

Authenic simon = new Authenic(); 
string newPassWord="";
bool Done = simon.changePassword("wuengfei",newPassWord); 

Answer 5

bool Done = simon.changePassword("wuengfei","MyNewPassWord"); 
把后面的"MyNewPassWord" 以字符串形式传入，
bool Done = simon.changePassword("wuengfei",newPassWord); 
这样输出newPassWord就可以了

Answer 6

 
  // 改成这样就行
   class Program
    {        
        class Authenic 
        { 
            private string Password = "123"; 
            public bool IsPassWordCorrect(string userPassWord) 
            { 
                return (Password == userPassWord) ? true : false; 
            } 
            public bool changePassword(string oldPassword,ref string newPassWord) 
            {
                if (oldPassword == Password)
                {
                    Password = newPassWord;
                    return true;
                }
                else
                {
                    return false;
                }
            } 
        } 
        static void Main(string[] args)
        {
            Program.Authenic simon = new Authenic();            // Authenic simon = new Authenic();
            string old_Password = Console.ReadLine();
            string new_Password = Console.ReadLine();
            bool Done = simon.changePassword(old_Password,ref new_Password);
            if (Done == true)
            {
                Console.WriteLine("密码修改成功");
                Console.WriteLine("The New PassWord is " + new_Password.ToString());
            }
            else
            {
                Console.WriteLine("密码修改失败");
            }
        }
    }