private void CreateOrUnhideDockableContent(ContentTypes contentType, string title, string viewPropertyName, object parent)
        {
            if (!this.dockableContents.Keys.Contains(contentType))
            {
                DockableContent dockableContent = new DockableContent();

                ContentControl contentControl = new ContentControl();

                dockableContent.IsCloseable = true;
                dockableContent.HideOnClose = false;

                dockableContent.Title = title;

                dockableContent.Content = contentControl;

                if (parent is ResizingPanel)
                {
                    DockablePane dockablePane = new DockablePane();
                    dockablePane.Items.Add(dockableContent);
                    ResizingPanel resizingPanel = parent as ResizingPanel;

                    switch (contentType)
                    {
                        case ContentTypes.PropertyInspector:
                            resizingPanel.Children.Add(dockablePane);
                            ResizingPanel.SetResizeWidth(dockablePane, new GridLength(300));
                            break;
                        case ContentTypes.Outline:
                            resizingPanel.Children.Insert(1, dockablePane);
                            ResizingPanel.SetResizeWidth(dockablePane, new GridLength(250));
                            break;
                        case ContentTypes.Toolbox:
                            resizingPanel.Children.Insert(0, dockablePane);
                            ResizingPanel.SetResizeWidth(dockablePane, new GridLength(250));
                            break;
                    }
                }
                else if (parent is DockablePane)
                {
                    DockablePane dockablePane = parent as DockablePane;
                    dockablePane.Items.Add(dockableContent);
                    if (dockablePane.Parent == null)
                    {
                        this.verticalResizingPanel.Children.Add(dockablePane);
                    }
                }

                Binding dataContextBinding = new Binding(viewPropertyName);
                dockableContent.SetBinding(DockableContent.DataContextProperty, dataContextBinding);

                Binding contentBinding = new Binding(".");
                contentControl.SetBinding(ContentControl.ContentProperty, contentBinding);

                this.dockableContents[contentType] = dockableContent;

                dockableContent.Closed += delegate(object sender, EventArgs args)
                {
                    contentControl.Content = null;
                    this.dockableContents[contentType].DataContext = null;
                    this.dockableContents.Remove(contentType);
                };
            }
            else
            {
                if (this.dockableContents[contentType].State == DockableContentState.Hidden)
                {
                    this.dockableContents[contentType].Show();
                }
            }
        }