In this moment I'm using the WSA model attaching to process for debug, so in this way every time I make a change to my module all web site is recompiled (the code change in my case only one dll in bin directory of my site), is correct that the entire site is rebuilt for the modification of a single dll?
About to modify the code in-line there is no way to work as windows form application, I must stop the debug every times I need to change a line of code, is it right?
Thanks to Michael for the response!

I use WAP model as described at this link  In this model as You've just said, whei I compile, only the module dll in the bin directory is built. But once DNN realize the change in the bin it rebuilds the whole site!

About Windows form application I wanted to say that I normally program windows applications and not web application, and the most troublesome difference I found is that when I debug a windows application I'm able to change the code in line during debug, Instead during debugging web applications I'm no able to do it. Is this correct or something I'm wrong? (I hope that my bad English has been understood)

Regards!