Download files from Azure Blob Storage using a SAS token

AzureBlobDownload.cs

using System;
using System.IO;
using System.Linq;
using System.Threading.Tasks;

using Microsoft.WindowsAzure.Storage;
using Microsoft.WindowsAzure.Storage.Auth;
using Microsoft.WindowsAzure.Storage.Blob;

namespace AzureBlobStorage
{
    internal static class Program
    {
        private static void Main()
        {
            const string accountName = "account-name";
            const string blobContainerName = "blob-container-name";
            const string downloadLocation = @"C:\data";
            const string sasToken =
                @"<SAS token (just the token, not the URI)>";
            
            // Create a credential object from the SAS token then use this and the account name to create a cloud storage connection
            var accountSAS = new StorageCredentials(sasToken);
            var storageAccount = new CloudStorageAccount(accountSAS, accountName, null, true);

            // Get the Blob storage container
            var blobClient = storageAccount.CreateCloudBlobClient();
            var container = blobClient.GetContainerReference(blobContainerName);

            // Fail if the container does not exist
            if (!container.Exists())
            {
                Console.Error.WriteLine($"Can't find container '{blobContainerName}'");
                return;
            }

            // Get the list of blobs in the container, just for demo purposes this is ordered by blob name and taking only
            // the first 10 items
            var blobs = container
                .ListBlobs(blobListingDetails: BlobListingDetails.Metadata)
                .OfType<CloudBlob>()
                .OrderBy(blobItem => blobItem.Name)
                .Take(10)
                .ToList();

            // Set the request options to ensure we're performing MD5 validation
            var downloadOptions = new BlobRequestOptions
            {
                DisableContentMD5Validation = false,
                UseTransactionalMD5 = true
            };

            // Download the files
            // The parameters are named for reference only and can safely be removed
            Task.WaitAll(
                blobs.Select(
                    blobItem => blobItem.DownloadToFileAsync(
                        path: Path.Combine(downloadLocation, blobItem.Name),
                        mode: FileMode.Create, 
                        accessCondition: null, 
                        options: downloadOptions, 
                        operationContext: null)).ToArray());
        }
    }
}