DisableUndoManager

The WPF TextBox that shipped with the .net 3.5 release had a bug, fixed in later versions, that prevents to set the UndoLimit property to 0, Radical provides a behavior as a workaround:

<TextBox Text="bla bla...">
    <i:Interaction.Behaviors>
        <behaviors:DisableUndoManagerBehavior />
    </i:Interaction.Behaviors>
</TextBox>

the behavior is defined in the http://schemas.topics.it/wpf/radical/windows/behaviors xml namespace.