public enum LasAttributeType : System.Enum, System.IComparable, System.IConvertible, System.IFormattable, System.ISpanFormattable  

{
  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);
    }
  }
}

{
  var lasPointsReturnsRendererDef = new LasUniqueValueRendererDefinition(LasAttributeType.ReturnNumber);
  lasPointsReturnsRendererDef.ModulateUsingIntensity = true;
  lasPointsReturnsRendererDef.SymbolScaleFactor = 1.0;
  // accept the defaults for color ramp, symbolTemplate
  // Note: Needs QueuedTask to run
  {
    if (lasDatasetLayer.CanCreateRenderer(lasPointsReturnsRendererDef))
    {
      CIMTinRenderer renderer = lasDatasetLayer.CreateRenderer(lasPointsReturnsRendererDef);
      if (lasDatasetLayer.CanSetRenderer(renderer, SurfaceRendererTarget.Points))
        lasDatasetLayer.SetRenderer(renderer, SurfaceRendererTarget.Points);
    }
  }
}