If you edit an ASPX page, you might have to rebuild before viewing it

If all you did was change some text, sometimes you can just hit F5 in your !@#$ing browser and see your changes. But if the page defines its !@#$ing controls in a !@#$ing code-behind file, and if you added a new control or edited one's !@#$ing ID, then you are going to get some kind of horrible, unhelpful YSOD that derails you for four !@#$ing hours until you realize you needed to rebuild your !@#$ing project first before debugging again.