.NET (pronounced “dot net”) is a free, cross-platform software development framework created by Microsoft. It is designed for building various types of applications such as web, mobile, desktop, and gaming.

.NET includes:
– Programming languages (C#, F#, and Visual Basic)
– .NET Class Library for rapid development of common tasks
– Common Language Runtime (CLR) for executing applications

Key advantages of .NET:
– Cross-platform support (Windows, Linux, macOS, iOS, Android, etc.)
– Support for multiple programming languages
– Extensive library of ready-to-use classes and functions
– Good performance and security
– Active developer community and Microsoft support

.NET simplifies and accelerates the development process by providing developers with convenient tools and ready-made components for solving common tasks. This makes .NET a popular choice for a wide range of applications.