Abstract Class
// an abstract method inside a class
public abstract class Student
{
public abstract void outputDetails();
}
public class CollegeStudent : Student
{
public string firstName;
public string lastName;
public string major;
public double GPA;
public override void outputDetails()
{
Console.WriteLine("Student " + firstName + " " + lastName + " enrolled in " + major + " is has a GPA of " + GPA);
}
}