.NET is a free, cross-platform, and open-source development platform for building many types of applications and it is also a software framework that is designed and developed by Microsoft. This platform uses multiple programming languages, libraries, and editors to build web, mobile, desktop applications, and many more. The basic version of the Dot NET framework was 1.0 which was introduced in the year 2002. In easy words, It is a virtual machine for compiling and executing programs written in different programming languages the most common ones like C#, F#, Virtual studio, etc. It is used to develop mobile-based applications, Web-based applications, Web services, and desktop applications.