A partial IdentityConfig.cs snippet

IdentityConfig.cs

public class ApplicationSignInManager : SignInManager<ApplicationUser, string>
{
    public ApplicationSignInManager(ApplicationUserManager userManager, IAuthenticationManager authenticationManager)
        : base(userManager, authenticationManager)
    { }

    public override Task SignInAsync(ApplicationUser user, bool isPersistent, bool rememberBrowser)
    {
        if (!user.EmailConfirmed)
        {
            return Task.Factory.StartNew(() => { return SignInStatus.RequiresVerification; });
        }
        return base.SignInAsync(user, isPersistent, rememberBrowser);
    }

    public override Task<ClaimsIdentity> CreateUserIdentityAsync(ApplicationUser user)
    {
        return user.GenerateUserIdentityAsync((ApplicationUserManager)UserManager);
    }

    public static ApplicationSignInManager Create(IdentityFactoryOptions<ApplicationSignInManager> options, IOwinContext context)
    {
        return new ApplicationSignInManager(context.GetUserManager<ApplicationUserManager>(), context.Authentication);
    }
}