c#winform pictureBox使用url加载图片

            string url = "http://b.hiphotos.baidu.com/image/pic/item/03087bf40ad162d93b3a196f1fdfa9ec8b13cde9.jpg";
            try
            {
                pictureBox1.Load(url);
            }
            catch (Exception ex)
            {
                //显示本地默认图片
            }