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    <p>I just found out what I was doing wrong! It was right in front of me and I didn't see it. </p> <p>The issue with this problem was that I had <code>Children</code> set as a DependencyProperty - which means that it will be static and global. So the whole <code>RadioButton</code> collection was available pretty much to all the controls in the Window. (On hindsight which is probably why StackPanel, Canvas etc. doesn't have the <code>Children</code> property as a DependencyProperty). <strong>You can find more information about this <a href="http://msdn.microsoft.com/en-us/library/aa970563.aspx" rel="nofollow noreferrer">here</a>.</strong></p> <p>Thanks kek444 for posting a simpler way to do this. :D</p> <p>In order to fix this what you need to do is remove the DependencyProperty and declare Children as a normal property with a private <code>set</code>. </p> <p>I have modified the code:</p> <p><strong>CustomControl.cs</strong></p> <pre><code>using System.Collections.Generic; using System.Windows; using Sytem.Windows.Controls; using System.Windows.Markup; namespace RandomControl { [ContentProperty("Children")] public class CustomControl1 : Control { private ObservableCollection&lt;RadioButton&gt; _children; private ItemsControl _control; public ObservableCollection&lt;RadioButton&gt; Children { get { if (_children == null) _children = new ObservableCollection&lt;RadioButton&gt;(); return _children; } private set { _children = value; } } static CustomControl1() { DefaultStyleKeyProperty.OverrideMetadata(typeof(CustomControl1), new FrameworkPropertyMetadata(typeof(CustomControl1))); } public override void OnApplyTemplate() { base.OnApplyTemplate(); _control = base.GetTemplateChild("PART_ItemsControl") as ItemsControl; // display the radio buttons if (_control != null) _control.ItemsSource = Children; } } } </code></pre> <p><strong>Generic.xaml</strong></p> <pre><code>&lt;ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:RandomControl"&gt; &lt;Style TargetType="{x:Type local:CustomControl1}"&gt; &lt;Setter Property="Template"&gt; &lt;Setter.Value&gt; &lt;ControlTemplate TargetType="{x:Type local:CustomControl1}"&gt; &lt;Border Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}"&gt; &lt;ItemsControl Name="PART_ItemControl" Background="{TemplateBinding Background}"&gt; &lt;ItemsControl.ItemsPanel&gt; &lt;ItemsPanelTemplate&gt; &lt;StackPanel&gt;&lt;/StackPanel&gt; &lt;/ItemsPanelTemplate&gt; &lt;/ItemsControl.ItemsPanel&gt; &lt;/ItemsControl&gt; &lt;/Border&gt; &lt;/ControlTemplate&gt; &lt;/Setter.Value&gt; &lt;/Setter&gt; &lt;/Style&gt; &lt;/ResourceDictionary&gt; </code></pre>
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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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