namespace WpfApplication2
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow:Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
        [STAThread]
        static void Main(string[] args)
        { 
            var b=new Button
            {
                Content="Click me"
            };

            var w = new Window
            {
                Title = "Code Demo",
                Content = b
            };
        }
    }
}