title: Asp.Net Identity sample - Where injected for account controller?
body: <p>When I create asp.net identity with individual account, I notice in account controller construct method, there are 2 parameters.</p>
  
  <pre><code>        public AccountController(ApplicationUserManager userManager, ApplicationSignInManager signInManager )
      {
          UserManager = userManager;
          SignInManager = signInManager;
      }
  </code></pre>
  
  <p>I want to know when they have been injected? because I havent seen any DI tools. </p>
  
  <p>Thanks</p>