private static bool HasXdtTransformFile(ICollection<IPackageFile> contentFiles)
{
return contentFiles.Any(file =>
file.Path != null &&
file.Path.StartsWith(Constants.ContentDirectory + Path.DirectorySeparatorChar, StringComparison.OrdinalIgnoreCase) &&
(file.Path.EndsWith(".install.xdt", StringComparison.OrdinalIgnoreCase) ||
file.Path.EndsWith(".uninstall.xdt", StringComparison.OrdinalIgnoreCase)));
}