I am learning WPF and am trying to create my first UserControl. My UserControl consists of

1. StackPanel
2. StackPanel contains a Label and TextBox

I am trying to create two Dependency Properties

1. Text for the Label
2. Orientation for the StackPanel - The orientation will affect the position of the Label and TextBox effectively

I have successfully created a Text dependency property and bind it to my UserControls . But when I created the Orientation property, I seem to get following error in get property

The as operator must be used with a reference type or nullable type ('System.Windows.Controls.Orientation' is a non-nullable value type)

public static DependencyProperty OrientationProperty = DependencyProperty.Register("Orientation", typeof(System.Windows.Controls.Orientation), typeof(MyControl), new PropertyMetadata((System.Windows.Controls.Orientation)(Orientation.Horizontal)));
public Orientation Orientation
{
    get { return GetValue(OrientationProperty) as System.Windows.Controls.Orientation; }
    set { SetValue(OrientationProperty, value); }
}

Appreciate your help.