Convert url to base 64

Question

Hallo I want covert http://malubov.blogspot.com/18090005.jpg to base 64. is it possible ? I tried to use this script but error 

 

Uri uri = new Uri("http://malubov.blogspot.com/18090005.jpg");

//string path = HttpContext.Current.Server.MapPath(uri.AbsolutePath);

//string base64String = null;

//using (System.Drawing.Image image = System.Drawing.Image.FromFile(path))

//{

// using (MemoryStream m = new MemoryStream())

// {

// image.Save(m, image.RawFormat);

// byte[] imageBytes = m.ToArray();

// base64String = Convert.ToBase64String(imageBytes);

// }

//}