Which of the following performed to fully debug an asp.net application running on same machine as a debugger?

Which of the following performed to fully debug an asp.net application running on same machine as a debugger?
1.Enable Debug information in the .net Asssembly
2.Setting Debug Attribute of the compilation element to true in the web.config file.
3.Setting Debug Element of the asp.net element to true in machine.config file true.
4. Enabling asp.net debugging in the IIS Metabase.