IIS7 - Tell me plase why my debugger timed out - Coz u r slow -"The web server process that was being debugged has been terminated by IIS"

When you are debugging, IIS will not service any other requests until you are done stepping through your code. That includes the "ping" request that IIS sends to itself. Since IIS doesn't hear back from itself, it decides to shut itself down, which promptly terminates your debugging.
The solution is to increase the Ping Maximum Response Time in the application pool settings from its default value of 90 seconds. Set it to something high enough that will give you enough time to debug your code (like maybe 900 seconds). If you are not able to debug in 15 min, one should really look for a job which does include hardcore coding.