internal static bool IsDotNetAppHostFilename(string filename)
 {
     if (!File.Exists(filename))
     {
         return(false);
     }
     return
         (AppHostUtils.IsDotNetBundleV1(filename) ||
          AppHostUtils.IsDotNetBundleV2_or_AppHost(filename) ||
          IsKnownDotNetAppHost(filename) ||
          AppHostUtils.IsDotNetAppHostV1(filename, out _));
 }