.Net framework is not a programming language but It is a tools which provide environment to execute the program, .Net support 63 programming language in which 11 language has developed by Microsoft and remaining 52 language has developed by another company or organization.

We can say framework is environment which is responsible for communication between os and programme for similar kind of c# interview questions check this link

In case of operating system independent languages code executes under a special software known as "Framework". "Framework is a software which will mask the functionality of an Operating System and makes the code under its control"Providing some features like1. OS In-dependency 2. Security 3. Automatic memory management.