/// <summary>
        /// Delete the specified lesson
        /// </summary>
        /// <param name="lsn">The lesson to delete</param>
        /// <returns></returns>
        public bool DeleteLesson(Lesson lsn)
        {
            try
            {
                Session.DbContext.Delete(lsn);

                return true;
            }
            catch
            {
                //Something went wrong
                return false;
            }
        }
 /// <summary>
 /// Delete the specified lesson
 /// </summary>
 /// <param name="lsn">The lesson to be deleted</param>
 /// <returns></returns>
 public bool DeleteLesson(Lesson lsn)
 {
     try
     {
         return lsn.Unit.Lessons.Remove(lsn);
     }
     catch
     {
         return false;
     }
 }
        /// <summary>
        /// Move a lesson into a unit
        /// </summary>
        /// <param name="lsn">The lesson to move</param>
        /// <param name="newUnt">The unit that the lesson is going into</param>
        /// <returns></returns>
        public bool MoveLesson(Lesson lsn, Unit newUnt)
        {
            try
            {
                lsn.UnitID = newUnt.ID;
                lsn.Unit = newUnt;

                //Remove the lesson from its current unit
                lsn.Unit.Lessons.Remove(lsn);

                //Move the lesson into its new unit
                newUnt.Lessons.Add(lsn);

                return true;
            }
            catch
            {
                //something went wrong
                return false;
            }
        }
        /// <summary>
        /// Create a new lesson in the specified unit
        /// </summary>
        /// <param name="unt">The unit to create the lesson in</4param>
        /// <returns></returns>
        public bool CreateNewLesson(Unit unt)
        {
            try
            {
                Lesson newLesson = new Lesson();

                newLesson.ID = Guid.NewGuid();
                newLesson.UnitID = unt.ID;
                newLesson.Unit = unt;
                newLesson.LessonName = "New Lesson";
                newLesson.LessonNum = (unt.Lessons.Count + 1);

                unt.Lessons.Add(newLesson);

                return true;
            }
            catch
            {
                return false;
            }
        }