<Window x:Class="ToolBarBindingTest.MainWindow"
		xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
		xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
		xmlns:tb="..."
		Title="MainWindow" Height="350" Width="525">
	<StackPanel>
		<!-- This works as expected - when I type into the text box, the text appears
		in the tool bar. -->
		<TextBox Name="text"/>
		<ToolBarTray>
			<ToolBar>
				<TextBlock Text="{Binding Text, ElementName=text}"></TextBlock>
			</ToolBar>
		</ToolBarTray>

		<!-- This doesn't work. The only difference I can is that the regular ToolBar is
		ItemsControl and therefore uses ItemsCollection as its collection, where my
		tb:ToolBar uses FreezableCollection<tb:TooBarControl>. For reasons I'm not really
		going to detail (because it is irrelevant),	I need strongly typed collection.

		A binding error is produced:
		System.Windows.Data Error: 4 : Cannot find source for binding with reference
		'ElementName=text2'. BindingExpression:Path=Text; DataItem=null; target element
		is 'TextBlock' (Name=''); target property is 'Text' (type 'String')
		 -->
		<TextBox Name="text2"/>
		<tb:ToolBar>
			<tb:ToolBarControl>
				<TextBlock Text="{Binding Text, ElementName=text2}"></TextBlock>
			</tb:ToolBarControl>
		</tb:ToolBar>
	</StackPanel>
</Window>