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    <p>It is wrong to believe that "RegisterAttached allows the value to be assigned to any dependency object whereas Register only allows it to be attached to the class passed as the ownerType parameter". Here is a perfectly working example of an attached property registered with Register:</p> <pre><code>class FooPropertyDeclaringType { public static readonly DependencyProperty FooProperty = DependencyProperty.Register("Foo", typeof(int), typeof(FooPropertyDeclaringType)); } class SomeUnrelatedType : DependencyObject { } class Program { static void Main() { var obj = new SomeUnrelatedType(); obj.SetValue(FooPropertyDeclaringType.FooProperty, 10); Debug.Assert(10 == (int)obj.GetValue(FooPropertyDeclaringType.FooProperty)); } } </code></pre> <p>Reflector shows that the only difference between Register and RegisterAttached is that the Register throws out much of the supplied metadata and only preserves it for the instances of registering class (via OverrideMetadata). It means that attributes such as Inherits and various update notifications usually specified in the metadata do not work on properties registered with Register and attached to objects of other types (other than the registering type). So Register is actually a stripped down version of RegisterAttached. It was probably made this way for performance reasons.</p> <p>In the <a href="http://blogs.msdn.com/b/bencon/archive/2006/07/24/677520.aspx" rel="noreferrer">example</a> linked by Haris Hasan in the comments to his answer, if you change RegisterAttached to Register, the buttons stop moving (because the property no longer provides AffectsParentArrange metadata for Button type) but they are nevertheless redrawn in their new locations when you resize the window. But if you add the same metadata to the Button type after a call to InitializeComponent():</p> <pre><code>RadialPanel.AngleProperty.OverrideMetadata( typeof(Button), new FrameworkPropertyMetadata( 0.0, FrameworkPropertyMetadataOptions.AffectsParentArrange)); </code></pre> <p>then everything works again as if RegisterAttached was called.</p>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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