public IHttpActionResult Post(ExamDTO examDTO)
{
Exam exam = new Exam()
{
CategoryID = examDTO.CategoryID,
Date = examDTO.Date,
Duration = examDTO.Duration,
IsActive = examDTO.IsActive,
LessonID = examDTO.LessonID,
Name = examDTO.Name
};
_examService.Add(exam);
return(Ok());
}