New Asp.Net MVC5 project produces an infinite loop to login page

Question

I am creating a brand new projet with Visual Studio 2013, I choose Asp.Net MVC and the framework 4.5.1 The project is created, then, I do nothing else than F5 to start the d

Answer 1

You are missing [AllowAnonymous] attribute on login action.

[AllowAnonymous]
public ActionResult Login(string returnUrl)
{
    // code....
}

2nd possibility, specific to IIS Express only: is that, if you created same default WebApplication1 project multiple times, playing with different authentication settings, IIS Express stored additional authentication settings in it's configuration file. Something like:

Configurations are in user's Documents folder Documents\IISExpress\config\, and you should look for:

applicationhost.config

Then just delete xml node mentioned above.

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Update for VS 2015+

If you're using Visual Studio 2015 or higher, check this path for the config file: $(solutionDir)\.vs\config\applicationhost.config

Each solution will have its own config file.