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

{
  // applies to TIN or LAS dataset layers only
  var edgeRendererDef = new TinEdgeRendererDefintion();
  edgeRendererDef.Description = "Edges";
  edgeRendererDef.Label = "Edges";
  edgeRendererDef.SymbolTemplate = lineSymbol.MakeSymbolReference();
  // Note: Needs QueuedTask to run
  {
    if (surfaceLayer.CanCreateRenderer(edgeRendererDef))
    {
      CIMTinRenderer renderer = surfaceLayer.CreateRenderer(edgeRendererDef);
      if (surfaceLayer.CanSetRenderer(renderer, SurfaceRendererTarget.Edges))
        surfaceLayer.SetRenderer(renderer, SurfaceRendererTarget.Edges);
    }
  }
}