private void compCoursesText_SelectedIndexChanged(object sender, EventArgs e)
        {
            string id;//stud id

            id = IDText.Text.ToString();
            if (compCoursesText.SelectedItem == null)
            {
                return;
            }
            //checking if student already registered to the specific course.
            foreach (string item in MyCourses.Items)
            {
                if (item == compCoursesText.GetItemText(compCoursesText.SelectedItem))
                {
                    MessageBox.Show("You are already registered to this course!", "ERROR", MessageBoxButtons.OK);
                    return;
                }
            }
            //if not..
            //demo version of registering to course..//

            //Do Draw of the course so student can see hours. ==> #1



            //Do available hours of same course. ==> #2



            //Do registering.. and save to DB. ==> #3
            AddCourseToStudent StudCourseAdd = new AddCourseToStudent(compCoursesText.GetItemText(compCoursesText.SelectedItem), id);

            StudCourseAdd.ShowDialog();
        }
        private void OptionCourses_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (OptionCourses.SelectedItem == null)
            {
                return;
            }
            AddCourseToStudent AddCourseToStudent = new AddCourseToStudent(OptionCourses.GetItemText(OptionCourses.SelectedItem).ToString(), IDText.Text.ToString());

            AddCourseToStudent.ShowDialog();
        }