cs代码：
/// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            ContentGrid.DataContext = this;
            this.Path = "数据绑定";
        }

        public string Path { get; set; }
    }
XAML代码：
    <Grid x:Name="ContentGrid">
        <TextBlock Text="{Binding Path}"></TextBlock>
    </Grid>