public OffsiteCourse(string courseName, string teacherName, List <Student> courseStudents, string town)
: base(courseName, teacherName, courseStudents)
{
Validation.ValidateStringInput(town);
this.Town = town;
}
public LocalCourse(string courseName, string teacherName, List <Student> courseStudents, string lab)
: base(courseName, teacherName, courseStudents)
{
Validation.ValidateStringInput(lab);
this.Lab = lab;
}