View your compilation source
Quick tip! You've all probably seen your ASPX page throw an untrapped exception at some point, but it's been years since I ever really read the page.
Sometimes, you'll be lucky enough to see a couple of links on there too, and it really is fascinating to follow those and see exactly how ASP.NET makes up your page. It's possible you didn't know that any piece of HTML you type on your.aspx gets turned into a .cs file with a LiteralControl containing that text. Which then gets compiled.
Yesterday I needed to see this "real" source code so that I could find out why something I coded hadn't worked. It can be quite tricky making those links appear!
Here's the answer: add this into your .aspx:
<%= 1/0 %>
Thanks to Scott for reminding me..