azure-functions

# Azure Functions Expert patterns for Azure Functions development including isolated worker model, Durable Functions orchestration, cold start optimization, and production patterns. Covers .NET, Python, and Node.js programming models. ## Patterns ### Isolated Worker Model (.NET) Modern .NET execution model with process isolation **When to use**: Building new .NET Azure Functions apps ### Template // Program.cs - Isolated Worker Model using Microsoft.Azure.Functions.Worker; using Microsoft.Extensions.DependencyInjection; using Microsoft.Extensions.Hosting; var host = new HostBuilder() .ConfigureFunctionsWorkerDefaults() .ConfigureServices(services => { // Add Application Insights services.AddApplicationInsightsTelemetryWorkerService(); services.ConfigureFunctionsApplicationInsights(); // Add HttpClientFactory (prevents socket exhaustion) services.AddHttpClient(); // Add your services services.AddSingleton<IMyService, MyService>(); }) .Build(); host.Run(); // HttpTriggerFunction.cs using Microsoft.Azure.Functions.Worker; using Microsoft.Azure.Functions.Worker.Http; using Microsoft.Extensions.Logging; public class HttpTriggerFunction { private readonly ILogger<HttpTriggerFunction> _logger; private readonly IMyService _service; public HttpTriggerFunction( ILogger<HttpTriggerFunction> logger, IMyService service) { _logger = logger; _service = se...