title: Create asp.net Image object from external image url
body: <p>I want to crop an image at the server side (I am using 'JCrop' and 'ASP.NET 3.5').
  There is a case when the user can add an image from external site to an article.I want 
  to anable the user to create a thumbnail from that image and store the result on the server.
  In this case code like</p>
  
  <pre><code>string originalFile = Server.MapPath(this.srcImage.ImageUrl);
  using (Image img = Image.FromFile(originalFile))
  {
      using (System.Drawing.Bitmap _bitmap = new System.Drawing.Bitmap(w, h))
      {
          _bitmap.SetResolution(img.HorizontalResolution, img.VerticalResolution);
          ......
          [Please see code here][1] will not work as the image URL is external and not a file on the server's file system.
  </code></pre>
  
  <p><strong>Can someone please show me how can I create an System.Drawing.Image object from a given external image URL string</strong></p>