Do you know that c# compiler is pre installed on your computer 😱

Question

Though it maybe Visual C# Compiler 2009 or 2005
This Compiler is always present in any of
the Microsoft Computer xp/7/8/10
To prove:
Go to C:\ Directory
go to Windows Directory
Search for a folder named 'Microsoft .NET'
open it and open any of the framework folder
then you'll see folders of many versions
Open CMD and Browse to the location
and just type 'csc' which stands for C# Compiler
Write a program in C# and save it in the folder
in which compiler is present then on CMD type
csc your_filename.cs

Answer 1

Your filename would be compiled and
there would be an .exe application made on
your name of file
Similar steps for VB.NET
just replace the keyword 'csc' to 'vbc'

Answer 2

No because I use my own Linux based OS ;)

Answer 3

I do not use ubuntu, I only use the Linux kernel itself as a base