.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。-Write a console application program has defined two classes, one class Class1 When you create the system automatically creates a user-defined class of Student requirements class contains private fields: school (string) , name (string) and gender (character), has three attributes: school (reading and writing), name (read-only), gender (read and write), there have arg constructor, with simultaneous display of students'　personal information method . Complete the following functions in the Main method of Class1 class: 1) Enter a student' s personal information (student number, name, sex)　the keyboard. 2) modify the student' s student number and gender. 3) the student' s personal information before and after the print changes.