Web Application Project Issues 101: "Could Not Load Type..."
One *Extremely* common newsgroup and forum post I've seen recently revolves around "double compilation" of stuff that was left in the APP_CODE folder when a project is migrated from WebSite mode to Web Application Project. For starters, I'll quote directly from "Mr. ASP.NET" Scott Guthrie's blog tutorial: "VERY, VERY IMPORTANT: Because ASP.NET 2.0 tries to dynamically compile any classes it finds under the /App_Code directory of an application at runtime, you explictly *DO NOT* want to store classes that you compile as part of your VS 2005 Web Application Project under an "app_code" folder. If you do this, then the class will get compiled twice -- once as part of the VS 2005 Web Application Project assembly, and then again at runtime by ASP.NET. The result will most likely be a "could not load type" runtime exception -- caused because you have duplicate type names in your application. Instead, you should store your class files in...