azure-functions

name	azure-functions
description	Use when building serverless event-driven applications with Azure Functions in .NET. Covers the isolated worker model, HTTP/Timer/Queue/Blob triggers, dependency injection, Durable Functions orchestration, and deployment. USE FOR: serverless HTTP APIs, event-driven processing (queues, blobs, timers), Durable Functions for long-running workflows, lightweight microservices without infrastructure management, scheduled background jobs DO NOT USE FOR: always-on web applications with WebSockets (use ASP.NET Core), complex multi-service orchestration with service discovery (use aspire), long-running compute without orchestration (use Azure Container Apps), Dapr-based microservices (use dapr)
license	MIT
metadata	{"displayName":"Azure Functions","author":"Tyler-R-Kendrick","version":"1.0.0"}
compatibility	claude, copilot, cursor
references	[{"title":"Azure Functions Documentation","url":"https://learn.microsoft.com/azure/azure-functions"},{"title":"Azure Functions .NET Worker GitHub Repository","url":"https://github.com/Azure/azure-functions-dotnet-worker"},{"title":"Microsoft.Azure.Functions.Worker NuGet Package","url":"https://www.nuget.org/packages/Microsoft.Azure.Functions.Worker"}]

Azure Functions

Overview

Azure Functions is a serverless compute platform that lets you run event-driven code without managing infrastructure. The .NET isolated worker model (recommended for .NET 8+) runs functions in a separate process with full control over the host, middleware pipeline, and dependency injection. Functions can be triggered by HTTP requests, timers, queues, blobs, Event Hubs, and more.

NuGet Packages

dotnet add package Microsoft.Azure.Functions.Worker
dotnet add package Microsoft.Azure.Functions.Worker.Sdk
dotnet add package Microsoft.Azure.Functions.Worker.Extensions.Http.AspNetCore
dotnet add package Microsoft.Azure.Functions.Worker.Extensions.Timer
dotnet add package Microsoft.Azure.Functions.Worker.Extensions.Storage.Queues
dotnet add package Microsoft.Azure.Functions.Worker.Extensions.Storage.Blobs
dotnet add package Microsoft.Azure.Functions.Worker.Extensions.DurableTask

Project Setup (Isolated Worker Model)

// Program.cs
using Microsoft.Azure.Functions.Worker;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

var host = new HostBuilder()
    .ConfigureFunctionsWebApplication()
    .ConfigureServices(services =>
    {
        services.AddApplicationInsightsTelemetryWorkerService();
        services.ConfigureFunctionsApplicationInsights();

        // Register your services
        services.AddHttpClient();
        services.AddSingleton<IOrderService, OrderService>();
        services.AddDbContext<AppDbContext>(options =>
            options.UseSqlServer(
                Environment.GetEnvironmentVariable("SqlConnectionString")));
    })
    .Build();

host.Run();

HTTP Trigger

using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Azure.Functions.Worker;
using Microsoft.Extensions.Logging;

public class OrderFunctions(IOrderService orderService, ILogger<OrderFunctions> logger)
{
    [Function("GetOrders")]
    public  Task<IActionResult> ()] HttpRequest req)
    {
        logger.LogInformation();
         orders =  orderService.GetAllAsync();
          OkObjectResult(orders);
    }

    []
    
    {
         order =  orderService.GetByIdAsync(id);
         order  
            ?  NotFoundResult()
            :  OkObjectResult(order);
    }

    []
    
    {
         order =  req.ReadFromJsonAsync<CreateOrderRequest>();
         (order  )
              BadRequestObjectResult();

         created =  orderService.CreateAsync(order);
          CreatedResult(, created);
    }
}