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    copied!<p>Had the same issue and found out that using x:Reference you cannot refer to any container of the object you are using it from. Nasty hack, but I'd imagine if you created some other control (<code>TextBlock</code>) and bound it's width to the <code>DataGrid</code> <code>ActualWidth</code> and THEN used x:Reference on that <code>TextBlock</code> it would avoid the cyclical reference</p> <pre><code>&lt;TextBlock x:Name="TextBlock1" Width="{Binding ElementName=myDataGrid, Path=ActualWidth}" /&gt; &lt;DataGrid AutoGenerateColumns="False" Background="White" ItemsSource="{Binding Items, Mode=OneWay}" HorizontalGridLinesBrush="Silver" VerticalGridLinesBrush="Silver" Margin="332,10,10,10" CanUserAddRows="False" CanUserDeleteRows="False" x:Name="myDataGrid" ColumnWidth="*"&gt; &lt;DataGrid.Columns&gt; &lt;DataGridTextColumn Width="{Binding Path=ActualWidth, Converter={StaticResource ResourceKey=WidthValueConverter}, Source={x:Reference Name=TextBlock1}}" IsReadOnly="True" Header="Column1" Binding="{Binding Value1, Mode=OneWay}" /&gt; &lt;DataGridTextColumn Width="{Binding Path=ActualWidth, Converter={StaticResource ResourceKey=WidthValueConverter}, Source={x:Reference Name=TextBlock1}}" IsReadOnly="True" Header="Column2" Binding="{Binding Value2, Mode=OneWay}"/&gt; &lt;DataGridTextColumn Width="{Binding Path=ActualWidth, Converter={StaticResource ResourceKey=WidthValueConverter}, Source={x:Reference Name=TextBlock1}}" IsReadOnly="True" Header="Column3" Binding="{Binding Value3, Mode=OneWay}"/&gt; &lt;/DataGrid.Columns&gt; &lt;/DataGrid&gt; </code></pre>
 

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