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.

student.txt

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