(xaml) Loading an image from a Base64 string in Windows Phone and Windows 8

MyPage.xaml

<!-- A WinRT XAML page -->

<Page
    x:Class="MyApp.MyPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:MyApp"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">

    <StackPanel 
        x:Name="LayoutRoot"
        Margin="19">
        <TextBlock
            Text="MY APPLICATION"
            FontSize="40" />
        <Image 
            Name="MyImage"
            Source="http://lorempixel.com/250/250/animals/8"
            MaxHeight="250"/>
        <Button
            Name="ImageButton"
            Click="ImageButton_Click"
            Content="Get New Image" />
    </StackPanel>
</Page>