bind Static property in Xaml WPF

I have a class (Session), which contain static property. Static property contain Brush type property (ForeGround). I want to bind Foreground property in a resource in wpf xaml.
(Foreground="{Binding Source={StaticResource session}, Path=Object.ForeGround}") does not work

I am unable to bind Foreground property.
Below is sample code

 public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            Session.Object = new Info() { ForeGround = Brushes.White };
        } 
private void Window_Loaded_1(object sender, RoutedEventArgs e)
        {
            //If I quick watch item. i got session object, and required foreground value is Ok.
            var item = this.FindResource("session");
        }       
    }
   //*****************************************
    public class Session
    {
        public static Info Object
        {
            get;
            set;
        }
    }
    //**************************************
    public class Info
    {
        public Brush ForeGround
        {
            get;
            set;
        }
    }

and here is WPF XAML

<Window.Resources><local:Session x:Key="session"/>        </Window.Resources><Grid removed="Gray"><Viewbox><TextBlock Name="txt" Text="Hello Text" Foreground="{Binding Source={StaticResource session}, Path=Object.ForeGround}"/></Viewbox></Grid>