如何访问虚拟类中的内容，以便可以将它们用于MAIN类中的If / Else语句？

Question

class Registration
{
    public virtual void Register()
    {
        int Registration_System;

        Console.Write("Registration System");
        Console.Write("\n 1. Add Student" +
                      "\n 2. View Student" +
                      "\n 3. Search" +
                      "\n 4. Edit" +
                      "\n 5. Delete" +
                      "\n 6. Exit");
        Console.Write("\nChoose: "); Registration_System = int.Parse(Console.ReadLine());
    }
}

class Program //Main class
{
    static void Main(string[] args)
    {
        Registration r = new Registration();
        r.Register();
        MSIT it = new MSIT();
        MSCS cs = new MSCS();



    }
}

so basically I need to access Registration_System 's value in order to use them in an if/else system for the Main class:

if (Registration_System == 1)
{
}
..

I'll be doing this with at least 6 other classes since I missed a couple of lessons. So far I just need to set up a skeleton for an If/Else so I can access all the other classes but I can't do that without using Registration_System 's value. Am I doing it correctly though? Is there another way?

Answer 1

What about using it as the return value of the Register function, like this:

public virtual int Register()
{
    ....
    return Registration_System;
}

Answer 2

First of all there is nothing called as Virtual classes in C#. I guess, you meant Virtual methods (?). Anyway, if you want to access the value of Registration_System in your Main class, either you'll have to make it a public global variable in the Registration class or will have to encapsulate it in a public property (again in the same Registration class) as mentioned by cpl.