Xaml to WPF code behind

Question

 Hi,
how to convert(move) this XAML code to Code behind in wpf( XAML---> code behind)

<Canvas  >
        <Image Name="ManImage"  >
            <Image.Triggers>
                <EventTrigger RoutedEvent="Image.Loaded">
                    <BeginStoryboard>
                        <Storyboard>
                            <DoubleAnimation Name="walking" Storyboard.TargetName="ManImage" Storyboard.TargetProperty="Width"
                                             From="200" To="200" Duration="0:0:0.2" Completed="DoubleAnimation_Completed"/>
                        </Storyboard>
                    </BeginStoryboard>
                </EventTrigger>
            </Image.Triggers>
        </Image>
        </Canvas>

Thanks and Regards

Muthukumar