How to edit web application during Debugging
If you are having the headache due to very slow debugging of Web Application and for every small to big change requires stopping and again starting the web application; here is the remedy for it:
Go to Web Application properties -> Web tab -> Select Use Visual Studio Development Server radio button and then check Enable Edit and Continue checkbox.
Then Go to Tools (in top menu of Visual Studio) -> Options -> Debugging (in left hand panel) -> General and then check "Break all processes when one process breaks" checkbox.
You should be able to edit during debugging itself and check the changes.

hi
Sagar
this is really very helpful information,
it help us very much at the time of editing in running website
thank you very much
keep posting
all the best
:)