public override bool OnPolygonCreated(NShape shape, NGisFeature feature)
            {
                NDataTableRow row         = feature.Attributes;
                string        countryName = (string)row["name_long"];
                decimal       population  = (decimal)row["pop_est"];

                string tooltip = countryName + "'s population: " + population.ToString("N0");

                shape.Tooltip = new NTooltip(tooltip);

                return(true);
            }
 public override bool OnMultiPolygonCreated(NShape shape, NGisFeature feature)
 {
     return(OnPolygonCreated(shape, feature));
 }