參考：

效果圖：

XAML程式碼：

<WrapPanel Grid.IsSharedSizeScope="True" Width="Auto">
    <Grid ShowGridLines="True" Width="Auto">
        <Grid.ColumnDefinitions>
            <ColumnDefinition SharedSizeGroup="SharedColumn"/>
            <ColumnDefinition SharedSizeGroup="SharedColumn"/>
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition SharedSizeGroup="SharedRow" />
            <RowDefinition SharedSizeGroup="SharedRow" />
        </Grid.RowDefinitions>
        <TextBox Grid.Column="0" Grid.Row="0"
                 Text="First Column" />
        <TextBox Grid.Column="1" Grid.Row="0"
                 Text="A Wider...... Column" />
        <TextBox Grid.Column="0" Grid.Row="1"
                 Text=" A &#x000A; Higher &#x000A; Row" />
    </Grid>
</WrapPanel>