Howto: Enable Debuging in SharePoint Web Application

English :

I know that people are already blogging this topic, but I just want to make summary of the procedure.

1. You need to modify 3 lines in web.config

2. The 3 lines are :

     a. 

     b.

     c.

Alternatively you can install “Debugger Feature” from codeplex. (http://www.codeplex.com/features)