New Post: AccessViolationException when accessing pixel color (GetPixel())

You are using it wrong. The WinRT's SetSource will not load it right away, so when you access a pixel the buffer is not filled. Just check PixelWidth and PixelHeight

That's why WBX has the FromStrean extension method:

var tmpImage = await BitmapFactory.New(1, 1).FromStream(memoryStream);

• Rene