public MetadataConfigurationProvider(
     MetadataConfigurationOptions options)
 {
     _options = options;
     // Initialize the HttpClient we use to fetch metadata.
     _http = new HttpClient()
     {
         BaseAddress = new Uri(
             "http://metadata.google.internal/computeMetadata/v1/")
     };
     _http.DefaultRequestHeaders.Add("Metadata-Flavor", "Google");
 }
 public MetadataConfigurationSource(
     MetadataConfigurationOptions options = null)
 {
     _options = options ?? new MetadataConfigurationOptions();
 }