public List<Course> GetCourses()
 {
     BLCourse blCourse = new BLCourse();
     return blCourse.GetCourseList();
 }
        public List<CoursePrerequisite> SaveCoursePrerequisite(int CourseID,List<CoursePrerequisite> coursePrerequisite)
        {
            BLCourse blCourse = new BLCourse();
            //CoursePrerequisite[] array1 ;

            return blCourse.SaveCoursePrerequisite(CourseID,coursePrerequisite);
        }
 public List<CoursePrerequisite> GetCoursePrerequisites(int  courseID)
 {
     BLCourse blCourse = new BLCourse();
     return blCourse.GetCoursePreRequisites(courseID);
 }
 public Course SaveCourseDetails(Course course)
 {
     BLCourse blCourse = new BLCourse();
     blCourse.SaveCourse(course);
     return course;
 }