What is .NET

Question

what is the .net framework and is this only used to develop windows apps or cross platform apps....?

Answer 1

.net is a run time enviroment and a virtual machine that executes bytecode, similar to the way java works. it is also a class library similar to the class library in java.
with .net core you can use it to develop cross platform apps. the mono implementation also allows you to develop cross platform.

Answer 2

Go through the answers here for a better explanation:

https://www.sololearn.com/Discuss/107085/?ref=app

An article you SHOULD read, additionaly:
https://www.wikipedia.org/wiki/.NET_Framework

Answer 3

c# programs can run on .net framework