language agnostic - Is there a way to stop users from downloading an image from your website? -

I am using asp.net but is open to using any language to do this. I have seen some javascript that do this but they seem very easy to roam around.

Is a reliable way to keep users from downloading an image?

Don do not put it on the website.

Seriously if you send it to the user, it is displayed for them, then they have an image, and thus can save the image. To implement any kind of policy, reliance on the browser must inevitably end in a defeat. If you can see it, you can copy it. The music industry is learning this lesson in a difficult way.