Using the AddAzureClients method to initialize Azure clients from an appsettings.json file

WorkerService.cs

// Extracts from a sample .NET Worker Service project

// You can add your target Azure resources in the Program.cs file using the 'AddAzureClients' method and extension methods from corresponding Azure services client libraries
// ...
var builder = Host.CreateApplicationBuilder(args);

builder.Services.AddAzureClients(clientBuilder => clientBuilder.AddSecretClient(builder.Configuration.GetSection("KeyVault")));
// ...

// Then you can 'inject' your Azure client into the Worker object (the Worker.cs file) and use them in your task
// ...
    public Worker(ILogger<Worker> logger, SecretClient secretClient)
    {
        _logger = logger;
        _secretClient = secretClient;
    }

    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
    {
        while (!stoppingToken.IsCancellationRequested)
        {
            if (_logger.IsEnabled(LogLevel.Information))
            {
                _logger.LogInformation("Worker running at: {time}", DateTimeOffset.Now);
            }

            try
            {
                KeyVaultSecret secret = await _secretClient.GetSecretAsync("myTestSecret1");
                Console.WriteLine($"Secret value is: {secret.Value}");
            }
            catch (AuthenticationFailedException e)
            {
                Console.WriteLine($"[ERROR] Authentication Failed. {e.Message}");
            }

            await Task.Delay(1000, stoppingToken);
        }
    }
// ...