Tenho uma extensão MVC3 HtmlHelper assim:

public static MvcHtmlString ShowInfoBar(this HtmlHelper helper, string message, InfoMessageType messageType)
    {
        return MvcHtmlString.Create(String.Format(@"<script type=""text/javascript"">$(document).ready(function () { gtg.core.showInfoBar('{0}', '{1}'}; );</script>", message, messageType.ToString().ToLower()));
    }

O valor demessage é"The product "Product Name" was saved successfully."

O valor demessageType éinfo.

Fica dizendoInput string was not in the correct format.

Estou preso?