public class CIMTinNodeRenderer : CIMTinSimpleRenderer, System.ComponentModel.INotifyPropertyChanged, System.Xml.Serialization.IXmlSerializable  

{
  // applies to TIN layers only
  var nodeRendererDef = new TinNodeRendererDefinition();
  nodeRendererDef.Description = "Nodes";
  nodeRendererDef.Label = "Nodes";
  nodeRendererDef.SymbolTemplate = nodeSymbol.MakeSymbolReference();

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