Mono is an open-source, cross-platform implementation of the .NET Framework, enabling developers to build and run .NET applications on Windows, Linux, and macOS. It includes a C# compiler, runtime, and libraries, making it a powerful solution for developing modern, scalable applications.

Features of Mono:

• Mono provides a cross-platform runtime, allowing .NET applications to run seamlessly on Linux, macOS, and Windows.
• It includes a robust C# compiler and a complete implementation of the .NET Framework class libraries.
• Mono supports ASP.NET, making it possible to deploy web applications outside of the Windows ecosystem.
• With its Just-In-Time (JIT) and Ahead-Of-Time (AOT) compilation capabilities, Mono optimizes performance for different environments.
• Mono integrates with popular development tools and frameworks, including Xamarin for mobile development.
• The framework supports embedding, enabling developers to integrate Mono into applications requiring .NET runtime functionality.
• Mono is open-source and actively maintained by the community, ensuring continuous improvements and support.

To Check the version, run:

 mono --version 

Disclaimer: Mono® is an open-source project under the MIT License. It is not affiliated with, endorsed by, or sponsored by Microsoft. Mono is provided "as is," without any warranty, express or implied. Users are responsible for understanding and complying with licensing terms and regulations while using Mono.