如何在不破坏哑剧的情况下重写（url）？

I have a url similar to /abc/1.png i then rewrite it to /full/path/1.png. However it seems like the mime is being clobbered because when hitting view image with firefox i get a download instead of a page with the image. How do i solve this? I am using C# and ASP.NET you can view this post for more details I have a url similar to /abc/1.png i then rewri