Layout

<GroupBox Header="Output" Width="260">
  <StackPanel>
    <TextBlock Text="Body Name" Margin="0,0,0,4" />
    <TextBox Text="Solid1" />
  </StackPanel>
</GroupBox>

<StackPanel Width="260">
  <TextBlock Text="Section one" />
  <Separator />
  <TextBlock Text="Section two" />
</StackPanel>

<Button Content="Hover for a themed tooltip"
        ToolTip="Themed tooltip - panel surface, theme border and font." />

<ScrollViewer Height="96" Width="260" VerticalScrollBarVisibility="Visible">
  <StackPanel>
    <!-- many items … -->
  </StackPanel>
</ScrollViewer>

<TabControl Width="300" Height="120">
  <TabItem Header="General"><TextBlock Text="General settings" /></TabItem>
  <TabItem Header="Advanced"><TextBlock Text="Advanced settings" /></TabItem>
  <TabItem Header="About"><TextBlock Text="About this add-in" /></TabItem>
</TabControl>