in Hands-on lab/lab-files/src/TollBooth/TollBooth/FileMethods.cs [24:32]
public FileMethods(ILogger log)
{
_log = log;
// Retrieve data lake storage account information from connection string.
var storageAccount = CloudStorageAccount.Parse(_blobStorageConnection);
// Create a blob client for interacting with the data lake account.
_blobClient = storageAccount.CreateCloudBlobClient();
}