Untitled

public class MasterLoginLogoutPartialActionExtension : IPartialActionExtension<MasterLoginLogoutModel>
{
    private readonly IAuthenticationManager _authenticationManager;

    public MasterLoginLogoutPartialActionExtension(IAuthenticationManager authenticationManager)
    {
        _authenticationManager = authenticationManager;
    }

    public MasterLoginLogoutModel Modify(MasterLoginLogoutModel model)
    {
        model.IsAuthenticated = _authenticationManager.LoggedIn;

        return model;
    }
}