New Post: PropertyGrid - Showing HorizontalContentAlignment and VerticalContentAlignment properties

Hi,
I believe the problem is in the MyCanvas or CanvasItem classes. Maybe a "TemplateBinding HorizontalContentAlignment" is missing.
Using a sample like the following moves the Horizontal and Vertical Content of the CanvasItem (button) as expected :

<Window x:Class="WpfApplication37.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:xctk="http://schemas.xceed.com/wpf/xaml/toolkit"
        xmlns:local="clr-namespace:WpfApplication37"
        Title="MainWindow" Height="350" Width="525">
    <local:MyCanvas>
      <local:CanvasItem x:Name="myButton" Content="My Button" Width="200" Height="25"/>
      <xctk:PropertyGrid SelectedObject="{Binding ElementName=myButton}" Canvas.Top="27"/>
   </local:MyCanvas>
</Window>

namespace WpfApplication37
{
  /// <summary>
  /// Interaction logic for MainWindow.xaml
  /// </summary>
  public partial class MainWindow : Window
  {
    public MainWindow()
    {
      InitializeComponent();
    }
  }

  public class MyCanvas : Canvas
  {
  }

  public class CanvasItem : Button
  {
  }
}