public Credentials prompt(Host bookmark, string title, string reason, LoginOptions options)
        {
            Credentials credentials = new VaultCredentials();

            credentials.setSaved(options.save());
            AsyncDelegate d = delegate
            {
                View                = ObjectFactory.GetInstance <IPasswordPromptView>();
                View.Title          = title;
                View.Reason         = reason;
                View.OkButtonText   = LocaleFactory.localizedString("Continue", "Credentials");
                View.IconView       = IconCache.Instance.IconForName(options.icon(), 64);
                View.SavePassword   = options.save();
                View.ValidateInput += ValidateInputEventHandler;
                if (DialogResult.Cancel == View.ShowDialog(_browser.View))
                {
                    throw new LoginCanceledException();
                }
                credentials.setPassword(View.InputText);
                credentials.setSaved(View.SavePassword);
            };

            _browser.Invoke(d);
            return(credentials);
        }