I was happily coding away the other day, when I came across the following error message when compiling my code in VS 2008: Failed to start monitoring changes to global.asax.  After a scratch of the head and another attempt at compiling, I still got the same message.  After a bit of digging around, I found the problem was in my web.config file and the offending line was:
After I removed this line, it compiled successfully.  Strange thing was, I have had this line in my web.config file for a long time and only now was the compiler working.  If anyone has any suggestions as to why, I'd be grateful to receive them.