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copied!<p>Have you considered setting the visibility of the TextBoxes to <code>Hidden</code>? This will "hide" the space that is assigned for the TextBoxes. Assuming their are no other controls in the StackPanel, then it will not be visible.</p> <p>Of course, this solution may make some naive assumptions about your implementation.</p> <p>If you need the more complex scenario, I would attempt the following: Note: This is psuedocode - may not compile..</p> <p>1) Use a MultiBinding</p> <pre><code><StackPanel> <StackPanel.Visibility Converter={StaticResource visibilityConverter}> <MultiBinding.Bindings> <Binding ElementName="textBox1" Path="Visibility" /> <Binding ElementName="textBox2" Path="Visibility" /> <Binding ElementName="textBox3" Path="Visibility" /> </MultiBinding.Bindings> </StackPanel.Visibility> </StackPanel> </code></pre> <p>2) Declare the Converter</p> <pre><code><Window.Resources> <local:VisibilityConverter x:Key="visibilityConverter" /> </Window.Resources> </code></pre> <p>3) Define the Converter</p> <pre><code>public class VisibilityConverter : IMultiValueConverter { public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture) { Visibility text1Vis = (Visibility)values[0]; Visibility text2Vis = (Visibility)values[1]; Visibility text3Vis = (Visibility)values[2]; if (text1Vis == text2Vis == text3Vis == Visibility.Collapsed) return Visibility.Collapsed; return Visibility.Visible; } } </code></pre>

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