Remote Debugging in Microsoft ASP.Net

Debug an Asp.net application or a web service, which runs in a remote host
(version of code does not need to be a debug built)

1. Install Visual Studio Remote Debugging Monitor(MSVSMON) in the remote host (server) – recommend to install as a windows application and make sure MSVSMON is listening for connections
2. Start Visual Studio and pull up source code for the relevant application - if you try to add break points to irrelevant code, break points will not be reached.
3. From main menu select -> Debug >> Attach to Process
   For the Qualifier use domain\user.name@machinename (Ex CSG\Charith.Gunasekara@CSG-UATWebTest) and refresh process list
4. Select required process from the (in this case asp.net work process(aspnet_wp.exe))
   Try inserting couple of breakpoints to the source code and browse the website.
5. This is useful if you cant replicate errors in local machine while investigating exceptions

Reference: Set Up Remote Debugging (MSDN)