I try to make my own ContentControl that derives from Control to fully understand dark wpf tree concepts. For now, i just implemented the logical part (Content) of the ContentControl.

My code behind :

```
[ContentProperty("Content")]
public class MyContentControl : Control
{
    public MyContentControl()
    {

    }

    public Object Content
    {
        get { return (Object)GetValue(ContentProperty); }
        set { SetValue(ContentProperty, value); }
    }

    public static readonly DependencyProperty ContentProperty =
        DependencyProperty.Register("Content", typeof(Object), typeof(MyContentControl), new UIPropertyMetadata());

}

```

XAML :

```
<StackPanel x:Name="stackPanel">
    <TextBlock Visibility="Collapsed" x:Name="textBlock" Text="Hello World"/>
    <ContentControl>
        <TextBlock Background="LightBlue" Text="{Binding Text, ElementName=textBlock}"/>
    </ContentControl>
    <local:MyContentControl>
        <TextBlock Text="{Binding Text, ElementName=textBlock}"/>
    </local:MyContentControl>
</StackPanel>

```

I got the following binding error :

> 
> System.Windows.Data Error: 4 : Cannot find source for binding with reference 'ElementName=textBlock'. BindingExpression:Path=Text; DataItem=null; target element is 'TextBlock' (Name=''); target property is 'Text' (type 'String')
> 
> 
> 

It is like the inner TextBlock can't go up in the logical tree and find the original textblock on which it should bind. I wasn't able to set myContentControl as the parent of the Content object.

Any idee?

Thanks for your time.

Jonas