/// 

        /// Loads the classes.
        /// 
        private void LoadLessons( List<Lesson> listCollection )
        {
            List<Lesson> checkedListCollection = new List<Lesson>();
            #region Adequate LessonCollection
            foreach ( Lesson model in listCollection )
            {
                if ( !checkedListCollection.Exists( delegate( Lesson t ) { return t.LessonId == model.LessonId; } ) )
                {
                    checkedListCollection.Add( model );
                }
            }
            lblNumberOfTotalLessons.Text = checkedListCollection.Count.ToString();
            dgLessons.CurrentPageIndex = 0;
            dgLessons.DataSource = checkedListCollection;
            dgLessons.ItemDataBound += new DataGridItemEventHandler( dgLessons_ItemDataBound );
            dgLessons.Columns[0].HeaderText = LocalizationUtility.GetText( "hdrName" );
            dgLessons.Columns[1].HeaderText = LocalizationUtility.GetText( "hdrSchedule" );
            dgLessons.Columns[2].HeaderText = LocalizationUtility.GetText( "hdrClass" );
            dgLessons.Columns[3].HeaderText = LocalizationUtility.GetText( "hdrCourse" );
            dgLessons.Columns[4].HeaderText = LocalizationUtility.GetText( "hdrClassRoom" );
            dgLessons.Columns[5].HeaderText = LocalizationUtility.GetText( "hdrStatus" );
            dgLessons.DataBind();
        }