public SegmentSymbolOptions GetSegmentSymbolOptions()

//var options = ApplicationOptions.EditingOptions;
QueuedTask.Run(() =>
{
  var seg_options = options.GetSegmentSymbolOptions();
  //to convert the options to a symbol use
  //SymbolFactory. Note: this is approximate....sketch isn't using the
  //CIM directly for segments
  var layers = new List<CIMSymbolLayer>();
  var stroke0 = SymbolFactory.Instance.ConstructStroke(seg_options.PrimaryColor, 
    seg_options.Width, SimpleLineStyle.Dash);
  layers.Add(stroke0);
  if (seg_options.HasSecondaryColor) {
    var stroke1 = SymbolFactory.Instance.ConstructStroke(
      seg_options.SecondaryColor, seg_options.Width, SimpleLineStyle.Solid);
    layers.Add(stroke1);
  }
  //segment symbology only
  var sketch_line = new CIMLineSymbol() {
    SymbolLayers = layers.ToArray()
  };
});

//var options = ApplicationOptions.EditingOptions;
QueuedTask.Run(() =>
{
  //change the segment symbol primary color to green and
  //width to 1 pt
  var segSymbol = options.GetSegmentSymbolOptions();
  segSymbol.PrimaryColor = ColorFactory.Instance.GreenRGB;
  segSymbol.Width = 1;

  //Are these valid?
  if (options.CanSetSegmentSymbolOptions(segSymbol)) {
    //apply them
    options.SetSegmentSymbolOptions(segSymbol);
          }
});