Here's a small code which will show you to display random image from your assets folder.
List<string> pics = new List<string>() { "Assets/img1.png", "Assets/img2.png", "Assets/img3.png", "Assets/zwp1.png", "Assets/zwp2.png", "Assets/zwp3.png", "Assets/zwp4.png", "Assets/zwp5.png" }; Random rnd=new Random(); ImageBrush brush1 = new ImageBrush(); brush1.ImageSource = new BitmapImage(new Uri(pics[rnd.Next(0,7)], UriKind.Relative)); img1.Source = brush1.ImageSource;