ASP.NET Core

ASP.NET Core is a fast, well-engineered backend framework. Dependency injection, middleware pipeline, Entity Framework for database access, and excellent performance benchmarks. Microsoft invests heavily in the developer experience.

The constraint is the ecosystem, not the quality. C# is a good language, but it ties you to the Microsoft stack — Visual Studio, Azure, NuGet. TypeScript with Bun and Elysia achieves the same type safety with a universal runtime that works everywhere. For teams already invested in .NET, ASP.NET Core is solid. For new projects without Microsoft commitments, the TypeScript ecosystem offers more flexibility.