public void buildGui()
        {
            try
            {
                var topPanel = this.add_Panel();
                //serializedString = topPanel.insert_Right(200).add_GroupBox("Serialized Object").add_SourceCodeViewer();
                //var serializedStringPanel = serializedString.splitContainer().panel2Collapsed(true);
                propertyGrid = topPanel.add_GroupBox("").add_PropertyGrid().helpVisible(false);
                treeView = propertyGrid.parent().insert_Left<Panel>().add_TreeView().sort();
                //treeView.splitterDistance(300);
                var toStringValue = propertyGrid.parent().insert_Below<Panel>(100).add_GroupBox("ToString Value (not editable):").add_TextArea();
                var optionsPanel = treeView.insert_Below<Panel>(70);
                var objectName = toStringValue.parent().insert_Above<Panel>(20).add_TextBox("name", "");
                //propertyGrid.onValueChange(updateSerializedString);

                //setSerializedStringSyncWithPropertyGrid();

                //serializedString.insert_Above(20).add_Link("Sync Serialized String With PropertyGrid", 0, 0, () => updateSerializedStringSyncWithPropertyGrid());

                LinkLabel invokeLink = null;
                invokeLink = optionsPanel.add_CheckBox("Show Methods", 0, 0,
                                (value) =>
                                {
                                    ShowMethods = value;
                                    invokeLink.enabled(value);
                                    refresh();
                                })
                                         .append_Link("invoke", invokeSelectedMethod)
                                            .leftAdd(-16).topAdd(5).bringToFront()
                                            .enabled(false);

                optionsPanel.add_CheckBox("Show Property and Field info", 22, 0,
                    (value) =>
                    {
                        ShowPropertyAndFieldInfo = value;
                        refresh();
                    })
                            .autoSize()
                            .append_Link("refresh", () => refresh())
                            .left(200);
                optionsPanel.add_CheckBox("Sort Values", 0, 135,
                    (value) =>
                    {
                        Sorted = value;
                        try
                        {
                            treeView.sort(Sorted);  // throwing "Unable to cast object of type 'System.Boolean' to type 'System.Windows.Forms.TreeView'"
                        }
                        catch//(Exception ex)
                        {
                            //ex.log();
                        }
                    }).@checked(true);

                simpleView_CheckBox = optionsPanel.add_CheckBox("Simple View", 0, 220,
                    (value) =>
                    {
                        SimpleView = value;
                        //propertyGrid.splitContainer().panel1Collapsed(value);
                        refresh();
                    })
                            .bringToFront();

                /*showSerializedString_CheckBox = optionsPanel.add_CheckBox("Show serialized string", 44, 0,
                    (value) =>
                    {
                        ShowSerializedString = value;
                        serializedStringPanel.panel2Collapsed(!value);
                        refresh();
                    })
                             .autoSize();*/

                createObjectWhenNull_CheckBox = optionsPanel.add_CheckBox("Create Object When Null", 44, 150,
                    (value) =>
                    {
                        CreateObjectWhenNull = value;
                    })
                            .bringToFront()
                            .autoSize();

                treeView.afterSelect<object>(
                    (selectedObject) =>
                    {
                        var treeNode = treeView.selected();
                        objectName.set_Text(treeNode.get_Text());
                        var tag = WinForms_ExtensionMethods_TreeView.get_Tag(treeNode);
                        if (tag.notNull())// && tag.str() != treeNode.get_Text())
                        {
                            propertyGrid.show(selectedObject);
                            var toString = selectedObject.str();
                            if (toString == "System.__ComObject")
                                toString += " : {0}".format(selectedObject.comObject_TypeName());
                            toStringValue.set_Text(toString);

                            propertyGrid.parent().set_Text(selectedObject.typeFullName());
                            if (treeNode.nodes().size() == 0)
                            {
                                addObjectPropertyAndFields(treeNode, selectedObject);
                            }
                        }
                        else if (treeNode.nodes().size() == 0)
                        {
                            propertyGrid.show(null as object);
                            propertyGrid.parent().set_Text("[null value]");
                            toStringValue.set_Text("[null value]");
                            objectName.set_Text("");
                            treeNode.color(Color.Red);
                        }

                    });
                treeView.add_ContextMenu().add_MenuItem("Invoke Method", () => invokeSelectedMethod());
            }
            catch (Exception ex)
            {
                ex.log("in buildGui", true);
            }
            guiReady = true;
        }