title: Can old App_Web.xxxx.dlls affect site behavior?
body: <p>I have ASP.NET Web Site project that deploys as precompiled to server. After deploy bin folder contains multiple App_Web.xxx.dll files. I know that I can delete old files before deploying new version but if I don't, can these old files somehow affect web site behavior? How ASP.NET finds that my last version page had compiled to App_Web_aaaaa.dll and App_Web_bbbbb.dll contains old version?</p>
  
  <p>Thanks!</p>