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New framework for C# (.NET) is gaining popularity: what developers need to know
The .NET ecosystem continues to actively develop, and in 2025 a new framework is emerging that is rapidly gaining the attention of C# developers. We are talking about Fusion.NET — a lightweight, high-performance framework for building modern web applications and microservices. Over the past three months, the number of stars on GitHub has exceeded 15,000, and the community has grown by 40%.
What is Fusion.NET?
Fusion.NET is an open-source framework built on .NET 9 that offers developers a fundamentally new approach to building web APIs. Its main feature is seamless integration with SignalR and built-in support for Real-time functions without the need to configure additional libraries. The framework also includes its own ORM (Object-Relational Mapping), optimized for working with high-load systems.
Key features of Fusion.NET
- Lightning-fast speed — benchmarks show a performance increase of up to 30% compared to ASP.NET Core thanks to a new router and optimized pipeline.
- Built-in Hot Reload — code changes are applied instantly without restarting the application, speeding up development by 2-3 times.
- Minimalistic syntax — creating a CRUD controller requires only 5-7 lines of code, lowering the entry barrier for beginners.
- Native WebAssembly support — allows running C# code directly in the browser without additional plugins.
- Built-in monitoring system — automatically collects performance metrics and errors, integrates with Prometheus and Grafana.
Why is Fusion.NET gaining popularity?
Analysts note several reasons for the framework's rapid growth. First, reduced development complexity: Fusion.NET handles routine tasks such as configuring CORS, serialization, and data validation. Second, an active community — the framework is maintained by former Microsoft engineers and is regularly updated (releases come out every 2 weeks). Third, excellent documentation and over 50 ready-made project templates on GitHub.
Already, large companies such as "Yandex.Market" and "Tinkoff" are testing Fusion.NET for their internal services. According to expert forecasts, by the end of 2025, the framework could enter the top 5 most used technologies in the .NET ecosystem.
How to start using Fusion.NET?
To install, simply run the command:
dotnet new install Fusion.NET.Templatesdotnet new fusion-api -n MyFirstAppcd MyFirstAppdotnet runThe framework is fully compatible with existing projects on .NET 8 and .NET 9, and also supports Docker containerization "out of the box".
Prospects and future
The Fusion.NET developers have already announced the release of version 2.0 in the third quarter of 2025. It is expected to add built-in gRPC support, improved Kubernetes integration, and a new tool for automatic API testing. If the current growth rate continues, Fusion.NET has every chance of becoming the standard for new C# projects.
