XAML Celsius Fahrenheit converter (no code behind)

Ever wanted to convert Celsius to Fahrenheit in your WPF application, without any code behind?

Here is how you do it, using a trick I learnt from Charles Petzold.

<DockPanel>

 <FrameworkElement Name="calcC2F" Visibility="Collapsed">
   <FrameworkElement.RenderTransform>
     <TransformGroup>
       <TranslateTransform X="{Binding ElementName=sldr, Path=Value}" />
         <ScaleTransform ScaleX="1.8" />
          <TranslateTransform X="32" />
         </TransformGroup>
        </FrameworkElement.RenderTransform>
       </FrameworkElement>
        
  <Slider Name="sldr" Minimum="-100" Maximum="100" TickFrequency="1"            IsSnapToTickEnabled="True" Value="0" Margin="5" DockPanel.Dock="Top"/>
        
  <DockPanel>

    <TextBlock Text="{Binding ElementName=sldr,Path=Value, StringFormat={}{0}°C}" FontSize="36" DockPanel.Dock="Top" HorizontalAlignment="Center"/>
      
    <TextBlock Text="{Binding ElementName=calcC2F, Path=RenderTransform.Value.OffsetX, StringFormat={}{0}°F}" 
FontSize="36" HorizontalAlignment="Center"/>
        
  </DockPanel>

 </DockPanel>

You can apply this principle to many occasions when you need to calculate something in XAML without having to resort to code behind!