public void ComputeExtents(IEnumerable <ClassDefinition> classes) { using (FdoFeatureService service = _conn.CreateFeatureService()) { IEnvelope env = service.ComputeEnvelope(classes); if (env != null) { _view.LowerLeftX = env.MinX.ToString(); _view.LowerLeftY = env.MinY.ToString(); _view.UpperRightX = env.MaxX.ToString(); _view.UpperRightY = env.MaxY.ToString(); } } }