delay binding image to XAML
<p>in my XAML code, I bind image thru local url; 
And in my C# code, I'm downloading the images from web to local url. 
So I hope the binding action can start after the image has been donwloaded to local disk, otherwise the image can not be displayed even when the image has been downloaded. 
Is there any way to delay the binding? </p>
