CLeanCLRCross-platform runtime

Write C#, Run Anywhere.

A CLR implementation built for production. Designed for high ECMA-335 compatibility, simple integration and cross-platform reach, giving C# applications more places to run.

CLRECMA-335Cross-platform

Read the documentation↗Source on GitHub↗

Runtime architecture / Conceptual overview

Application
    │
    ▼
.NET assemblies
    │
    ▼
LeanCLR runtime
    │
    └── Platform abstraction → Target OS

DESIGNED FOR

Teams looking to run C# across platforms or embed a CLR in their own applications.

01 / CORE CAPABILITIES

Real-world needs.
Carefully engineered capabilities.

Full technical documentation ↗

A standards-driven runtime

Built around ECMA-335 compatibility to bring existing C# code and .NET assemblies to more environments.

Simpler integration

Clear runtime boundaries for embedding C# capabilities into your own applications.

Built for cross-platform delivery

Separate business logic from the target platform. See the official documentation for supported platforms, integration options and release status.

02 / HOW IT FITS

Fits your development workflow.

A clear technical path, from input to execution.

01C# application
02.NET assemblies
03LeanCLR
04Target platform

Conceptual product workflow. See the documentation for configuration and integration details.

03 / GET STARTED

Get started with
LeanCLR

Understand it. Validate it. Build it into your project.

Read the docsInstallation, core concepts and compatibility

↗02

Explore the sourceProject information, releases and community discussions

↗03

Discuss your projectCommercial editions, integration and technical support

↗