public Student(int studentID, string naam, Klas klas)
{
this.klas = klas;
this.studentID = studentID;
this.naam = naam;
cursussen = new List <Cursus>();
}
public Student(string naam, Klas klas)
{
this.naam = naam;
this.klas = klas;
System.Random random = new Random();
this.studentID = random.Next(5000);
cursussen = new List <Cursus>();
}