Evenly-sized buttons according to content of largest button

The Grid

  <Grid HorizontalAlignment="Right" Grid.IsSharedSizeScope="true">    <Grid.ColumnDefinitions>        <ColumnDefinition SharedSizeGroup="A"/>        <ColumnDefinition SharedSizeGroup="A"/>    </Grid.ColumnDefinitions>    <Grid.Children>        <Button Grid.Column="0" Content="OK"/>        <Button Grid.Column="1" Content="Cancel"/>    </Grid.Children>  </Grid>

This can be broken up, you just need to set the IsSharedSizeScope on a common ancestor, e.g.:

    <StackPanel Grid.IsSharedSizeScope="true">        <Grid HorizontalAlignment="Right">            <Grid.ColumnDefinitions>                <ColumnDefinition SharedSizeGroup="A"/>            </Grid.ColumnDefinitions>            <Grid.Children>                <Button Grid.Column="0" Content="OK"/>            </Grid.Children>        </Grid>        <!-- ... -->        <Grid HorizontalAlignment="Left">            <Grid.ColumnDefinitions>                <ColumnDefinition SharedSizeGroup="A"/>            </Grid.ColumnDefinitions>            <Grid.Children>                <Button Grid.Column="0" Content="Cancel"/>            </Grid.Children>        </Grid>    </StackPanel>

To prevent the buttons from becoming too large change the HorizontalAlignment of the Grid to something else than Stretch or set a MaxWidth.

Use UniformGrid<UniformGrid HorizontalAlignment="Right" Rows="1" Columns="2">  <Button Content="Ok" Grid.Column="0"/>  <Button Content="Cancel" Grid.Column="1"/></UniformGrid>

I like using a wrap panel for this type of scenario. When it's loaded I get the max width from all children using linq. (assuming children are all buttons)

xaml

<WrapPanel Name="WP_ButtonSelections" Orientation="Horizontal" HorizontalAlignment="Center" Loaded="WP_ButtonSelections_Loaded"></WrapPanel>

cs

WP_ButtonSelections.Children.Add(new Button() { Content = "Hello" });WP_ButtonSelections.Children.Add(new Button() { Content = "Hello World" });private void WP_ButtonSelections_Loaded(object sender, RoutedEventArgs e){   double maxWidth = WP_ButtonSelections.Children.OfType<FrameworkElement>().Max(elm => elm.ActualWidth);   WP_ButtonSelections.Children.OfType<FrameworkElement>().ToList().ForEach(elm => elm.Width = maxWidth);}

I needed a programmatic solution. This requires the loaded event because programmatically added buttons wont have an ActualWidth defined upon calling WP_ButtonSelections.Children.Add(). This solution should work with xaml defined buttons, or a mixture of both xaml and programmatic.