public BlobHelper()
{
string connectionString = Settings.AzureConnectionString();
CloudStorageAccount cloudStorageAccount = CloudStorageAccount.Parse(connectionString);
cloudBlobClient = cloudStorageAccount.CreateCloudBlobClient();
cloudBlobClient.ServerTimeout = Settings.Timeout();
cloudBlobClient.RetryPolicy = new LinearRetry(TimeSpan.FromSeconds(3), Settings.RetryCount());
}