static void Main(string[] args)
{
Student student = new Student();
School school = new School();
Console.WriteLine("Studying at school");
student.Study(school);
University university = new University();
Console.WriteLine("\nEnter to Unniversity\n");
ISchool enterToUnversity = new EnterToUniversityAfterSchool(university);
Console.WriteLine("Studying at university");
student.Study(enterToUnversity);
Console.ReadKey();
}
public EnterToUniversityAfterSchool(University uni)
{
university = uni;
}