Adding Rectangle to StackPanel


   
      

<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Glyphs and Fonts" Height="300" Width="350"
    >
  <StackPanel>
        <Rectangle  Width="200"  Height="50" />
  </StackPanel>
</Window>