I am working on a Windows 8 app. I need to know how to programmatically set the Source of an Image. I assumed that the Silverlight approach would work. However, it doesn\'t.
check your pictureUrl since it was what resulted in the exception.
but this should work as well
img.Source = new BitmapImage(new Uri(pictureUrl, UriKind.Absolute));
it should have nothing to do with Windows.Foundation.Uri. since winrt will handle it for you.