protected string SketchTipID {get; set;}

// 1. Add an embeddable control using VS template.  This is the daml entry

//<categories>
//  <updateCategory refID = "esri_embeddableControls">
//    <insertComponent id="SketchTip_EmbeddableControl1" className="EmbeddableControl1ViewModel">
//      <content className = "EmbeddableControl1View"/>
//    </insertComponent>
//  </updateCategory>
// </categories>

// 2. Define UI controls on the EmbeddableControl1View
// 3. Define properties on the EmbeddableControl1ViewModel which
//    bind to the UI controls on the EmbeddableControl1View

public class SketchToolWithUISketchTip : MapTool
{
  public SketchToolWithUISketchTip()
  {
    IsSketchTool = true;
    SketchType = SketchGeometryType.Line;
    SketchOutputMode = SketchOutputMode.Map;
    SketchTipID = "SketchTip_EmbeddableControl1";
  }


  protected override Task<bool> OnSketchModifiedAsync()
  {
    var sketchTipVM = SketchTipEmbeddableControl as EmbeddableControl1ViewModel;
    if (sketchTipVM != null)
    {
      // modify properties on the sketchTipVM
      QueuedTask.Run(async () =>
      {
        var sketch = await GetCurrentSketchAsync();
        var line = sketch as Polyline;
        var count = line.PointCount;

        sketchTipVM.Text = "Vertex Count " + count.ToString();
      });


    }

    return base.OnSketchModifiedAsync();
  }

}