public EditUniversity(University university) : this()
{
//обьект, который будет меняться
this.university = new University(university);
}
public static void ChangeUniversityById(this List <University> universities, int id, University university)
{
for (int i = 0; i < universities.Count; i++)
{
if (universities[i].Id == id)
{
universities[i] = university;
}
}
}