public LasStretchRendererDefinition()

{
  var lasCP_renderers = new LasDatasetLayerCreationParams(lasDataset);
  lasCP_renderers.Name = "My LAS Layer";
  lasCP_renderers.IsVisible = false;

  // create a point elevation renderer
  var ptR = new LasStretchRendererDefinition();
  // accept all defaults

  // create a simple edge renderer
  var edgeR = new TinEdgeRendererDefintion();
  // accept all defaults

  // add renderers to dictionary
  var l_dict = new Dictionary<SurfaceRendererTarget, TinRendererDefinition>();
  l_dict.Add(SurfaceRendererTarget.Points, ptR);
  l_dict.Add(SurfaceRendererTarget.Edges, edgeR);

  // assign dictionary to creation params
  lasCP_renderers.RendererDefinitions = l_dict;
  // Note: Needs QueuedTask to run
  {
    //Create the layer to the LAS dataset
    var lasDatasetLayer_rd = LayerFactory.Instance.CreateLayer<LasDatasetLayer>(lasCP_renderers, map);
  }
}