public AssignSubjectToProfessorControl()
        {
            InitializeComponent();

            List <Professor> professorsList = usersData.GetAllProfessors();

            foreach (Professor professor in professorsList)
            {
                professorsBox.Items.Add(professor.degree + " " + professor.Name + " " + professor.Surname);
            }

            List <Subject> subjectsList = otherData.GetAllUnassignedSubjects();

            foreach (Subject subject in subjectsList)
            {
                subjectsListBox.Items.Add(subject.Title);
            }
        }