编写一个控制台应用程序，程序中有两个类定义，一个是创建程序时系统自动创建的类Class1，一 个是用户自定义的Student类，

要求该类包含私有字段：学号(字符串)、姓名（字符串）和性别（字符），具有三个属性：学号（读写）、姓名（只读）、性别（读写），

具有有参构造方法、具有同时显示学生个人信息的方法。在Class1类的Main方法中完成以下功能：

（1）从键盘上输入一个学生的个人信息（学号、姓名、性别）。

(2）修改该学生的学号和性别。　　

（3）打印修改前后该学生的个人信息。-2. Write a console application, the program has two class definition, a class Class1 is automatically created when you create the program, one is user-defined class Student,

Requirements class contains private fields: school (string), name (string) and gender (character), has three attributes: Student ID (read-write), name (read-only), gender (read-write),

There have arg constructor, having also shows students　personal information. Complete the following features in the Main method Class1 class:

(1) Enter a student s personal information (student number, name, sex)　the keyboard.

(2) modify the student s student number and gender.

The student s personal information before and (3) Print modifications.