/// <summary>
 /// Adds the additional demographic.
 /// </summary>
 /// <param name="additional">The additional.</param>
 /// <returns></returns>
 public IHttpActionResult AddAdditionalDemographic(AdditionalDemographicsModel additional)
 {
     return(new HttpResult <Response <AdditionalDemographicsModel> >(_additionalDemographicsDataProvider.AddAdditionalDemographic(additional), Request));
 }