Refreshing claims using ASP.NET Identity Cooke based AuthN

gistfile1.cs

public static class AuthenticationManagerExtensions
{
    public static void RefreshUserClaims(
        this IAuthenticationManager authManager,
        IEnumerable<Claim> updatedClaims,
        string authenticationType)
    {
        var identity = new ClaimsIdentity(updatedClaims, authenticationType);
        authManager.SignOut(authenticationType);
        authManager.SignIn(identity);
    }
}