public async Task <SetBlobMetadataResponse> SetBlobMetadataAsync(string containerName, string blobName, Dictionary <string, string> metadata, string leaseId = null)
        {
            var request  = new SetBlobMetadataRequest(_account, containerName, blobName, metadata, leaseId);
            var response = await request.ExecuteAsync();

            return(response.Payload);
        }
        public SetBlobMetadataResponse SetBlobMetadata(string containerName, string blobName, Dictionary <string, string> metadata, string leaseId = null)
        {
            var request  = new SetBlobMetadataRequest(_account, containerName, blobName, metadata, leaseId);
            var response = request.Execute();

            return(response.Payload);
        }