WPF VB.Net

  x:Class="WpfApplication1.Window1"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  Title="Window1" 
  Height="200" 
  Width="200"
  Background="{DynamicResource WindowBackgroundBrush}">