C# Tutorial "Visibility and Accessibility Modifiers" : Exercise: Use the protected modifier

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Visibility and Accessibility Modifiers

Exercise: Use the protected modifier

Goal

Modify the example classes

Add a protected property to the class 'Student' named 'GraduationYear' of type int.

using System;

public class Student
{
    public Student(int graduationYear)
    {
        GraduationYear = graduationYear;
    }

    public int GetYearsSinceGraduation()
    {
        return DateTime.Now.Year - GraduationYear;
    }
}

public class Graduate : Student
{
    public Graduate(int graduationYear)
        : base(graduationYear)
    {

    }

    public void GraduateToday()
    {
        GraduationYear = DateTime.Now.Year;
    }
}

public class Program
{
    public static void Main()
    {
        var student = new Student(2006);
        Console.WriteLine("Years since gradation: {0}", student.GetYearsSinceGraduation());
    }
}

​x
 
using System;
​
public class Student
{
    public Student(int graduationYear)
    {
        GraduationYear = graduationYear;
    }
​
    public int GetYearsSinceGraduation()
    {
        return DateTime.Now.Year - GraduationYear;
    }
}
​
public class Graduate : Student
{
    public Graduate(int graduationYear)
        : base(graduationYear)
    {
​
    }
​
    public void GraduateToday()
    {
        GraduationYear = DateTime.Now.Year;
    }
}
​
public class Program
{
    public static void Main()
    {
        var student = new Student(2006);
        Console.WriteLine("Years since gradation: {0}", student.GetYearsSinceGraduation());
    }
}