public static void SetWildcardCorsOnBlobService(this CloudStorageAccount storageAccount) { storageAccount.SetCORSPropertiesOnBlobService(cors => { var wildcardRule = new CorsRule() { AllowedMethods = CorsHttpMethods.Get, AllowedOrigins = { "*" } }; cors.CorsRules.Clear(); cors.CorsRules.Add(wildcardRule); return(cors); }); }