public Models.ClassTeacherSchedule.GradeCourseModel GetGradeCourseByID(int GradeCourseID)
        {
            BusinessLogic.ClassTeacherSchedule.GradeCourseManager GradeCourseManager = new BusinessLogic.ClassTeacherSchedule.GradeCourseManager();
            BusinessEntity.ClassTeacherSchedule.GradeCourseEntity GradeCourse        = GradeCourseManager.GetGradeCourseByID(GradeCourseID);

            return(new Models.ClassTeacherSchedule.GradeCourseModel(GradeCourse));
        }