public static string GetNpeProtocolUrl(UrlHelper urlHelper, string id, string version)
 {
     return String.Format(
         CultureInfo.InvariantCulture,
         "npe://none?id={0}&version={1}&url={2}",
         id,
         version,
         urlHelper.PackageDownload(2, id, version));
 }
 public string GetNpeActivationArgument(UrlHelper urlHelper)
 {
     return PackageMetadata.Id + "|" + 
         PackageMetadata.Version.ToString() + "|" +
         urlHelper.PackageDownload(2, PackageMetadata.Id, PackageMetadata.Version.ToString());
 }