WPF 动态加载ＸＡＭＬ

　　　　　　　// Get the XAML content from an external file.
            DependencyObject rootElement;
            using (FileStream fs = new FileStream(xamlFile, FileMode.Open))
            {
                rootElement = (DependencyObject)XamlReader.Load(fs);
            }

            // Insert the markup into this window.
            this.Content = rootElement;                       

            // Find the control with the appropriate name.
            //button1 = (Button)LogicalTreeHelper.FindLogicalNode(rootElement, "button1");
            FrameworkElement frameworkElement = (FrameworkElement)rootElement;
            button1 = (Button)frameworkElement.FindName("button1");