I am using xaml with PS, and I want to use my background image source as base64. I can't use the relative path anymore, hence my base64 approach, how do I change this to use the base64 as a source. 
    
<Window.Background>
        
    </Window.Background>
    <Grid x:Name="mygrid">
        <Grid.Background>
            <ImageBrush ImageSource="/Wallpapers1280x1024.jpg"/>
        </Grid.Background>