static DSSolid CreateSolid(IGeometryEntity host, bool persist)
        {
            ISolidEntity entity = host as ISolidEntity;

            if (null == entity)
            {
                return(null);
            }
            if (entity.IsNonManifold())
            {
                return(new DSNonManifoldSolid(entity, persist));
            }

            return(DSSolid.CreateSolid(entity, persist));
        }