private void OnDetailCommand(DataGrid currentDataGrid)
 {
     try
     {
         GetAcademicByID_Result data = (GetAcademicByID_Result)currentDataGrid.SelectedItem;
         selectedSubjectID = data.DisciplineID;
         SubjectDetail     = new ObservableCollection <GetDetailDisciplineByID_Result>(ST.GetDetailDisciplineByID(selectedSubjectID).ToList());
     }
     catch
     {
         return;
     }
 }