public sealed class LasDatasetLayer : SurfaceLayer, ArcGIS.Desktop.Core.IMetadataInfo, IMetadataSource, System.ComponentModel.INotifyPropertyChanged  

{
  // find the first TIN layer
  tinLayer = MapView.Active.Map.GetLayersAsFlattenedList().OfType<TinLayer>().FirstOrDefault();

  // find the first Terrain layer
  terrainLayer = MapView.Active.Map.GetLayersAsFlattenedList().OfType<TerrainLayer>().FirstOrDefault();

  // find the first LAS dataset layer
  lasDatasetLayer = MapView.Active.Map.GetLayersAsFlattenedList().OfType<LasDatasetLayer>().FirstOrDefault();

  // find the first surface layer
  surfaceLayer = MapView.Active.Map.GetLayersAsFlattenedList().OfType<SurfaceLayer>().FirstOrDefault();
}

{
  string lasPath = @"d:\Data\LASDataset.lasd";
  var lasURI = new Uri(lasPath);

  var lasCP = new LasDatasetLayerCreationParams(lasURI);
  lasCP.Name = "My LAS Layer";
  lasCP.IsVisible = false;
  // Note: Needs QueuedTask to run
  {
    //Create the layer to the LAS dataset
    lasDatasetLayer = LayerFactory.Instance.CreateLayer<LasDatasetLayer>(lasCP, map);
  }
}

{
  if (lasDataset == null)
    throw new ArgumentNullException(nameof(lasDataset));

  var lasCP_ds = new LasDatasetLayerCreationParams(lasDataset);
  lasCP_ds.Name = "My LAS Layer";
  lasCP_ds.IsVisible = false;
  // Note: Needs QueuedTask to run
  {
    //Create the layer to the LAS dataset
    var lasDatasetLayer_ds = LayerFactory.Instance.CreateLayer<LasDatasetLayer>(lasCP_ds, map);
  }
}

{
  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);
  }
}

{
  var lasPointsClassificationRendererDef = new LasUniqueValueRendererDefinition(LasAttributeType.Classification);
  // accept the defaults for color ramp, symbolTemplate, symbol scale factor

  if (lasDatasetLayer == null)
    return;
  // Note: Needs QueuedTask to run
  {
    if (lasDatasetLayer.CanCreateRenderer(lasPointsClassificationRendererDef))
    {
      CIMTinRenderer renderer = lasDatasetLayer.CreateRenderer(lasPointsClassificationRendererDef);
      if (lasDatasetLayer.CanSetRenderer(renderer, SurfaceRendererTarget.Points))
        lasDatasetLayer.SetRenderer(renderer, SurfaceRendererTarget.Points);
    }
  }
}