BL.Security.eliminar_permiso C# (CSharp) Method

        public void eliminar_permiso(string permisoCod)
        {
            try
            {
                var permisoQuery = from per in entidad.permisos
                                   where per.id == permisoCod
                                   select per;

                DataAccess.permiso permisoTMP = permisoQuery.First();
                entidad.DeleteObject(permisoTMP);
                entidad.SaveChanges();
            }
            catch (Exception e)
            {
                throw new Exception(e.ToString() + " --Security.cs / eliminar_permiso()");
            }
        }