public adminCoursesList()
        {
            InitializeComponent();
            SqlCommand    Courses = new SqlCommand("select * from course", Program.dbconnection);
            SqlDataReader data    = Courses.ExecuteReader();
            int           cnt     = 0;

            while (data.Read())
            {
                AdminCoursePanel pnl = new AdminCoursePanel(data.GetInt32(0), data.GetString(3), data.GetString(5));
                CoursesPanel.Controls.Add(pnl);
                cnt++;
            }
            data.Close();
        }
        public void  updateCoursesList()
        {
            while (CoursesPanel.Controls.Count > 0)
            {
                CoursesPanel.Controls[0].Dispose();
            }

            SqlCommand    Courses = new SqlCommand("select * from course", Program.dbconnection);
            SqlDataReader data    = Courses.ExecuteReader();
            int           cnt     = 0;

            while (data.Read())
            {
                AdminCoursePanel pnl = new AdminCoursePanel(data.GetInt32(0), data.GetString(3), data.GetString(5));
                CoursesPanel.Controls.Add(pnl);
                cnt++;
            }
            data.Close();
        }