public IHttpActionResult GetDocumentType()
 {
     try{
         DocumentTypeManager manager = new DocumentTypeManager();
         List <DocumentType> lista   = manager.Obtener();
         return(Ok(lista));
     }
     catch (Exception e)
     {
         return(NotFound());
     }
 }
 public IHttpActionResult GetDocumentType(int id)
 {
     try{
         DocumentTypeManager manager = new DocumentTypeManager();
         var tag = manager.Obtener(id);
         if (tag != null)
         {
             return(Ok(tag));
         }
         else
         {
             return(BadRequest());
         }
     }
     catch (Exception e)
     {
         return(NotFound());
     }
 }