program.cs

using Azure.Storage.Blobs;
using Azure.Storage.Blobs.Models;

Console.WriteLine("Azure Blob Storage exercise\n");

// Run the examples asynchronously, wait for the results before proceeding
ProcessAsync().GetAwaiter().GetResult();

Console.WriteLine("Press enter to exit the sample application.");
Console.ReadLine();

static async Task ProcessAsync()
{
    // Copy the connection string from the portal in the variable below.
    string storageConnectionString = "replace with the conn. string";

    // Create a client that can authenticate with a connection string
    BlobServiceClient blobServiceClient = new BlobServiceClient(storageConnectionString);

    // COPY EXAMPLE CODE BELOW HERE

//Create a unique name for the container
string containerName = "wtblob" + Guid.NewGuid().ToString();

// Create the container and return a container client object
BlobContainerClient containerClient = await blobServiceClient.CreateBlobContainerAsync(containerName);
Console.WriteLine("A container named '" + containerName + "' has been created. " +
    "\nTake a minute and verify in the portal." + 
    "\nNext a file will be created and uploaded to the container.");
Console.WriteLine("Press 'Enter' to continue.");
Console.ReadLine();
// Create a local file in the ./data/ directory for uploading and downloading
string localPath = "./data/";
string fileName = "wtfile" + Guid.NewGuid().ToString() + ".txt";
string localFilePath = Path.Combine(localPath, fileName);

// Write text to the file
await File.WriteAllTextAsync(localFilePath, "Hello, World!");

// Get a reference to the blob
BlobClient blobClient = containerClient.GetBlobClient(fileName);

Console.WriteLine("Uploading to Blob storage as blob:\n\t {0}\n", blobClient.Uri);

// Open the file and upload its data
using (FileStream uploadFileStream = File.OpenRead(localFilePath))
    {
await blobClient.UploadAsync(uploadFileStream);
uploadFileStream.Close();
    }

Console.WriteLine("\nThe file was uploaded. We'll verify by listing" + 
        " the blobs next.");
Console.WriteLine("Press 'Enter' to continue.");
Console.ReadLine();

// List blobs in the container
Console.WriteLine("Listing blobs...");
await foreach (BlobItem blobItem in containerClient.GetBlobsAsync())
{
    Console.WriteLine("\t" + blobItem.Name);
}

Console.WriteLine("\nYou can also verify by looking inside the " + 
        "container in the portal." +
        "\nNext the blob will be downloaded with an altered file name.");
Console.WriteLine("Press 'Enter' to continue.");
Console.ReadLine();

// Download the blob to a local file
// Append the string "DOWNLOADED" before the .txt extension 
string downloadFilePath = localFilePath.Replace(".txt", "DOWNLOADED.txt");

Console.WriteLine("\nDownloading blob to\n\t{0}\n", downloadFilePath);

// Download the blob's contents and save it to a file
BlobDownloadInfo download = await blobClient.DownloadAsync();

using (FileStream downloadFileStream = File.OpenWrite(downloadFilePath))
{
    await download.Content.CopyToAsync(downloadFileStream);
}
Console.WriteLine("\nLocate the local file in the data directory created earlier to verify it was downloaded.");
Console.WriteLine("The next step is to delete the container and local files.");
Console.WriteLine("Press 'Enter' to continue.");
Console.ReadLine();

// Delete the container and clean up local files created
Console.WriteLine("\n\nDeleting blob container...");
await containerClient.DeleteAsync();

Console.WriteLine("Deleting the local source and downloaded files...");
File.Delete(localFilePath);
File.Delete(downloadFilePath);

Console.WriteLine("Finished cleaning up.");
}