WPF C# Tutorial

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="Microsoft.Samples.Graphics.RectangleExample"
    WindowTitle="Example">
  
                     Width="100" Height="50" Margin="5" HorizontalAlignment="Left">
                       Width="100" Height="50" Margin="5"  HorizontalAlignment="Left">
                     Width="100" Height="50" >
                       Width="100" Height="50" >