public class EditingOptions 

{
  //toggle, switch Editing option values
  var options = ApplicationOptions.EditingOptions;

  options.EnforceAttributeValidation = !options.EnforceAttributeValidation;
  options.WarnOnSubtypeChange = !options.WarnOnSubtypeChange;
  options.InitializeDefaultValuesOnSubtypeChange = !options.InitializeDefaultValuesOnSubtypeChange;
  options.UncommitedAttributeEdits = (options.UncommitedAttributeEdits ==
    UncommitedEditMode.AlwaysPrompt) ? UncommitedEditMode.Apply : UncommitedEditMode.AlwaysPrompt;

  options.StretchGeometry = !options.StretchGeometry;
  options.StretchTopology = !options.StretchTopology;
  options.UncommitedGeometryEdits = (options.UncommitedGeometryEdits ==
    UncommitedEditMode.AlwaysPrompt) ? UncommitedEditMode.Apply : UncommitedEditMode.AlwaysPrompt;

  options.ActivateMoveAfterPaste = !options.ActivateMoveAfterPaste;
  options.ShowFeatureSketchSymbology = !options.ShowFeatureSketchSymbology;
  options.FinishSketchOnDoubleClick = !options.FinishSketchOnDoubleClick;
  options.AllowVertexEditingWhileSketching = !options.AllowVertexEditingWhileSketching;
  options.ShowDeleteDialog = !options.ShowDeleteDialog;
  options.EnableStereoEscape = !options.EnableStereoEscape;
  options.DragSketch = !options.DragSketch;
  options.ShowDynamicConstraints = !options.ShowDynamicConstraints;
  options.IsDeflectionDefaultDirectionConstraint =
    !options.IsDeflectionDefaultDirectionConstraint;
  options.IsDirectionDefaultInputConstraint = !options.IsDirectionDefaultInputConstraint;
  options.ShowEditingToolbar = !options.ShowEditingToolbar;
  options.ToolbarPosition = (options.ToolbarPosition == ToolbarPosition.Bottom) ?
            ToolbarPosition.Right : ToolbarPosition.Bottom;
  options.ToolbarSize = (options.ToolbarSize == ToolbarSize.Medium) ?
            ToolbarSize.Small : ToolbarSize.Medium;
  options.MagnifyToolbar = !options.MagnifyToolbar;

  options.EnableEditingFromEditTab = !options.EnableEditingFromEditTab;
  options.AutomaticallySaveEdits = !options.AutomaticallySaveEdits;
  options.AutoSaveByTime = !options.AutoSaveByTime;
  options.SaveEditsInterval = (options.AutomaticallySaveEdits) ? 20 : 10;
  options.SaveEditsOperations = (options.AutomaticallySaveEdits) ? 60 : 30;
  options.SaveEditsOnProjectSave = !options.SaveEditsOnProjectSave;
  options.ShowSaveEditsDialog = !options.ShowSaveEditsDialog;
  options.ShowDiscardEditsDialog = !options.ShowDiscardEditsDialog;
  options.DeactivateToolOnSaveOrDiscard = !options.DeactivateToolOnSaveOrDiscard;
  options.NewLayersEditable = !options.NewLayersEditable;
}

{
  var eOptions = ApplicationOptions.EditingOptions;

  var followLinkedLines = eOptions.AutomaticallyFollowLinkedLineFeatures;
  var followLinedPolygons = eOptions.AutomaticallyFollowLinkedPolygonFeatures;
  var usePlacementProps = eOptions.UseAnnotationPlacementProperties;
  var followMode = eOptions.AnnotationFollowMode;
  var placementMode = eOptions.AnnotationPlacementMode;


  eOptions.AnnotationFollowMode = AnnotationFollowMode.Parallel;
  eOptions.AnnotationPlacementMode = AnnotationPlacementMode.Left;
}

{
  var options = ApplicationOptions.EditingOptions;
  await QueuedTask.Run(() =>
  {
    //There are 4 vertex symbol settings - selected, unselected and the
    //current vertex selected and unselected.
    var reg_select = options.GetVertexSymbolOptions(VertexSymbolType.RegularSelected);
    var reg_unsel = options.GetVertexSymbolOptions(VertexSymbolType.RegularUnselected);
    var curr_sel = options.GetVertexSymbolOptions(VertexSymbolType.CurrentSelected);
    var curr_unsel = options.GetVertexSymbolOptions(VertexSymbolType.CurrentUnselected);

    //to convert the options to a symbol use
    //GetPointSymbol
    var reg_sel_pt_symbol = reg_select.GetPointSymbol();
    //ditto for reg_unsel, curr_sel, curr_unsel
  });
}