Custom Image in HtmlContentProvider

Hello,

I can't seem to get a custom image to appear in the HtmlContentProvider.

public class CustomHtmlContentProvider : HtmlContentProvider
	{
		private readonly Model _model;

		public CustomHtmlContentProvider(Model model, string html)
			: base(html)
		{
			_model = model;
		}

		protected override Image GetImage(string source)
		{
			if (source.StartsWith("resource:"))
			{
				BitmapImage bitmapImage = new BitmapImage();
				switch (source)
				{
					case "resource:statement":
						bitmapImage = new BitmapImage(_model.GraphicStatementUri);
						break;
				}

				var image = new Image
				{
					Source = bitmapImage,
					Height = 16,
					Width = 16
				};
				//image.Stretch = Stretch.Uniform;
				//image.VerticalAlignment = VerticalAlignment.Center;
				//image.HorizontalAlignment = HorizontalAlignment.Center;

				return image;
			}

			return base.GetImage(source);
		}
	}

The GetContent will hit this code, but the image is not displayed.  Do you have an example of using a custom image in the quick info tip?