<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  Title="Buttons in a Canvas">
  <Canvas>
    <Button Background="Red">Left=0, Top=0</Button>
    <Button Canvas.Left="18" Canvas.Top="18"
            Background="Orange">Left=18, Top=18</Button>
    <Button Canvas.Right="18" Canvas.Bottom="18"
            Background="Yellow">Right=18, Bottom=18</Button>
    <Button Canvas.Right="0" Canvas.Bottom="0"
            Background="Lime">Right=0, Bottom=0</Button>
    <Button Canvas.Right="0" Canvas.Top="0"
            Background="Aqua">Right=0, Top=0</Button>
    <Button Canvas.Left="0" Canvas.Bottom="0"
            Background="Magenta">Left=0, Bottom=0</Button>
  </Canvas>
</Window>