A little summary of Visual Studio debugging Global

In the development of MVC project encountered some problems, want to see the cause of the problem by flirting, found unable to debug the Application_Start method in Global, find all over the internet there is no corresponding solution, after a lot of attempts still have no clue, and then a new MVC Project can debug the code within the Global, compared to two project settings found that the new project is the use of the server is "IIS Express", the existing project is the use of "Local IIS" to change the existing project to "IIS Express" You can then debug the code in Global. But if you want to debug the code inside Global by using "local IIS", you have to change the managed pipeline mode of the application pool to "classic" mode.

New Project Settings:

Existing Project settings:

A little summary of Visual Studio debugging Global