/// <summary>
 /// Delete API/Classe/{id}
 /// </summary>
 /// <param name="id">id de la Classe à supprimer</param>
 public IHttpActionResult Delete(int id)
 {
     if ((new[] { "Admin" }).Contains(ValidateTokenAndRole.ValidateAndGetRole(Request), StringComparer.OrdinalIgnoreCase))
     {
         if (repo.GetOne(id) == null)
         {
             return(NotFound());
         }
         else
         {
             repo.Delete(id);
             return(Ok());
         }
     }
     else
     {
         return(Unauthorized());
     }
 }