InMemoryFeatureLayer inm = new InMemoryFeatureLayer();
            TextStyle style1 = TextStyles.CreateSimpleTextStyle("name", "Arial", 10, DrawingFontStyles.Regular, GeoColor.StandardColors.Black, 10, 0);
            TextStyle style2 = TextStyles.CreateSimpleTextStyle("value", "Arial", 10, DrawingFontStyles.Regular, GeoColor.StandardColors.Black, 10, -20);
            style2.NumericFormat = "{0:f2} ha";
            Thread.CurrentThread.CurrentCulture = CultureInfo.CreateSpecificCulture("fr-FR");
            PointStyle point = PointStyles.Capital1;

            inm.ZoomLevelSet.ZoomLevel01.CustomStyles.Add(style1);
            inm.ZoomLevelSet.ZoomLevel01.CustomStyles.Add(style2);
            inm.ZoomLevelSet.ZoomLevel01.CustomStyles.Add(point);
            inm.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;

            inm.Open();
            inm.Columns.Add(new FeatureSourceColumn("name"));
            inm.Columns.Add(new FeatureSourceColumn("value"));

            Feature a = new Feature(0, 0);
            a.ColumnValues.Add("name", "capital");
            a.ColumnValues.Add("value", "66,666666666");

            inm.InternalFeatures.Add(a);

            Map1.MapUnit = GeographyUnit.DecimalDegree;
            LayerOverlay overlay = new LayerOverlay();
            overlay.Layers.Add(inm);
            overlay.TileType = TileType.SingleTile;
            Map1.Overlays.Add(overlay);
            Map1.CurrentExtent = new RectangleShape(0, 1, 1, 0);
            Map1.Refresh();