public async Task <GetBlobMetadataResponse> GetBlobMetadataAsync(string containerName, string blobName, string leaseId = null)
        {
            var request  = new GetBlobMetadataRequest(_account, containerName, blobName, leaseId);
            var response = await request.ExecuteAsync();

            return(response.Payload);
        }
        public GetBlobMetadataResponse GetBlobMetadata(string containerName, string blobName, string leaseId = null)
        {
            var request  = new GetBlobMetadataRequest(_account, containerName, blobName, leaseId);
            var response = request.Execute();

            return(response.Payload);
        }