public void AddMarkCourseTeacher(MarkCourseTeacherDto markCourseTeacherDto)
        {
            var markCourseTeacher = _mapper.Map <MarkCourseTeacher>(markCourseTeacherDto);

            markCourseTeacher.CourseTeacherId = _courseRepository.GetCourseTeacherId(markCourseTeacherDto.CourseId,
                                                                                     markCourseTeacherDto.TeacherId);
            _markRepository.AddMarkCourseTeacher(markCourseTeacher);
        }