//Checked
        #region ViewAvailableCourses()
        private void btnAvailableCourses_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                //Hiding other views
                gdEditMyProfile.Visibility  = Visibility.Hidden;
                gdMyProfile.Visibility      = Visibility.Hidden;
                GridMyCourses.Visibility    = Visibility.Hidden;
                gdCreateHomework.Visibility = Visibility.Hidden;


                dgAvaliableCourses.ItemsSource = bll.GetAvailableCourses();

                //Making the Available COurses Datagrid visible
                GridAvaliableCourses.Visibility = Visibility.Visible;
            }
            catch (CourseException ex)
            {
                MessageBox.Show(ex.Message);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }