I draw diagrams, but I see old image on the new page
<p>I am developing a C# web project. I run it on the local web server.
I draw. I show image as follows:</p>

<pre><code>bitmap.Save(Server.MapPath("diagram.jpg"), ImageFormat.Jpeg);
Image1.ImageUrl = ResolveUrl("diagram.jpg");
</code></pre>

<p>I don't see new image. Only old one, which I had after changing image name
(Say, I  change diagram.jpg to diagram2.jpg).
Browser is Firefox.
The design page in C# is simple. Just Image and few TextBoxes on the page.
No UpdatePanel and such.
Something with caching... But how to fight with that...</p>
