format text of a point on RadMap

        public RadForm1()
        {
            InitializeComponent();

            string cacheFolder = @"..\..\cache";
            OpenStreetMapProvider osmProvider = new OpenStreetMapProvider();
            MapTileDownloader tileDownloader = osmProvider.TileDownloader as MapTileDownloader;
            tileDownloader.WebHeaders.Add(System.Net.HttpRequestHeader.UserAgent, "your application name");
            LocalFileCacheProvider cache = new LocalFileCacheProvider(cacheFolder);
            osmProvider.CacheProvider = cache;
            this.radMap1.MapElement.Providers.Add(osmProvider);
            this.radMap1.Layers.Add(new MapLayer("myLayer"));

            PointG racheer = new PointG(42.3665137, -71.06160420);
            CustomMapPoint point = new CustomMapPoint(racheer);
            point.Image = Properties.Resources.New_York ;
            point.Size = new Size(15, 15);
            point.Text = "New York";
            point.ForeColor = Color.Red; 
            radMap1.MapElement.Layers["myLayer"].Add(point);
        }

        public class CustomMapPoint : MapPoint
        {
            public CustomMapPoint(PointG location) : base(location)
            {
            }

            protected override void PaintText(Telerik.WinControls.Paint.IGraphics graphics, IMapViewport viewport)
            {
                if (this.Text == null)
                {
                    return;
                }

                long mapSize = MapTileSystemHelper.MapSize(viewport.ZoomLevel);

                object state = graphics.SaveState();

                SizeF size = graphics.MeasureString(this.DrawText, System.Windows.Forms.Control.DefaultFont, new StringFormat());
                SizeF space = graphics.MeasureString("X", System.Windows.Forms.Control.DefaultFont, new StringFormat());
                MapVisualElementInfo info = this.GetVisualElementInfo(viewport);
                RectangleL drawRect = info.Path.GetBounds();
                drawRect.Offset(viewport.PanOffset.Width + info.Offset.X, viewport.PanOffset.Height + info.Offset.Y);
                RectangleF textRect = new RectangleF(drawRect.X + drawRect.Width / 2f - size.Width / 2f, drawRect.Y - size.Height - space.Width / 2f, size.Width, size.Height);

                for (int i = 0; i < viewport.NumberOfWraparounds; i++)
                {
                    graphics.FillRectangle(textRect,Color.Yellow);
                    graphics.DrawString(this.DrawText, new RectangleF(textRect.Location, size), this.Font, this.ForeColor, new StringFormat(), System.Windows.Forms.Orientation.Horizontal, false);
                    textRect.Offset(mapSize, 0);
                }

                graphics.RestoreState(state);
            }

            public override void Paint(Telerik.WinControls.Paint.IGraphics graphics, IMapViewport viewport)
            {
                object state = graphics.SaveState();
                graphics.ChangeSmoothingMode(SmoothingMode.AntiAlias);
                Graphics g = graphics.UnderlayGraphics as Graphics;

                MapVisualElementInfo info = this.GetVisualElementInfo(viewport);
                GraphicsPath path = info.Path.Clone() as GraphicsPath;
			
                Matrix matrixOffset = new Matrix();
                matrixOffset.Translate(viewport.PanOffset.Width + info.Offset.X, viewport.PanOffset.Height + info.Offset.Y);
                path.Transform(matrixOffset);

                long mapSize = MapTileSystemHelper.MapSize(viewport.ZoomLevel);
                Matrix matrixWraparound = new Matrix();
                matrixWraparound.Translate(mapSize, 0);

                for (int i = 0; i < viewport.NumberOfWraparounds; i++)
                {
                    RectangleF bounds = path.GetBounds();
                    FillPrimitiveImpl fill = new FillPrimitiveImpl(this, null);
                    fill.PaintFill(graphics, path, bounds);
                    
                    BorderPrimitiveImpl border = new BorderPrimitiveImpl(this, null);
                    border.PaintBorder(graphics, null, path, bounds);

                    if (this.Image != null)
                    {
                        PointF point = new PointF(bounds.X + (bounds.Width - this.Image.Width) / 2f * (float)this.ImageScale, bounds.Y - this.Image.Width * (float)this.ImageScale);
                        int decreaseImageHeightValue = 30;
                        RectangleF imageRect = new RectangleF(point, new SizeF(this.Image.Size.Width * (float)this.ImageScale, (this.Image.Size.Height - decreaseImageHeightValue) * (float)this.ImageScale));
                        g.DrawImage(this.Image, imageRect);
                    }

                    path.Transform(matrixWraparound);
                }

                graphics.RestoreState(state);

                this.PaintText(graphics, viewport);
            }
        }