If it wasn't for .NET, users would have to install a runtime environment for programs in each language. That is, to run a Visual Basic application, you have to download a runtime for Visual Basic.
This would very quickly fill up all the space on your computer with slightly different copies of the same libraries.
It's also important for programmers because it allows them to develop one environment that's used for four languages at once. Otherwise, ordinary developers would have to wait for a new version of the libraries for their language.
As a .Net developer, Devox Software
https://devoxsoftware.com/technology/microsoft-net-development-company/ delivers reliable, secure and scalable .Net applications to businesses around the world
There is probably no other technology company with such a complete and consistent ecosystem that meets all the needs for engineers, from IDEs and frameworks to cloud services.