What are Some Best Practices for .NET Microservices?

Microservices in .NET allow you to build scalable, independent, and deployable services that communicate via APIs or messaging systems. However, microservices come with complexity, especially around communication, deployment, monitoring, and consistency.

Single Responsibility Principle

// BlogService
GET /api/posts
POST /api/posts
// UserService (separate microservice)
GET /api/users
POST /api/users/register

API Contracts and Versioning

Use API versioning to avoid breaking clients.

[ApiVersion("1.0")]
[Route("api/v{version:apiVersion}/posts")]
public class PostsController : ControllerBase
{ [HttpGet] public IActionResult GetPosts() => Ok(...);
}

Secure Each Service

Use JWT Bearer tokens with ASP.NET Core.

services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme) .AddJwtBearer(options => { options.Authority = "https://auth.example.com"; options.Audience = "blog-api"; });

Conclusion

Designing microservices in .NET is more than just splitting projects, it’s about clear boundaries, robust communication, strong observability, and automation. By following these practices, you can build resilient, scalable, and maintainable systems.