Please help me, How do i run a C# program on laptop?

Question

I've been trying everything such as pressing Ctrl+f5 and Ctrl+fn+f5
I am using an Hp like laptop. I am not using Visual Studio but the one sololearn gives you aka the code playground.
Please help me if you know how to do so i'm begging.
FAQ
Yes i am using the sololearn code playground
Yes i am pressing f5 and not 5
The reason the i don't download visual studio is because it requires a lot of internet and i'm in a place in africa where their is no wifi so instead i'm using a sim card
Please help and thank you.

Answer 1

You dont have to click f5 in sololearn playground, just click on run in the bottom

Answer 2

@Nasif Rahman but no ones giving an answer that works!

Answer 3

You could try installing mono on windows
https://www.mono-project.com/docs/getting-started/install/windows/
and follow this quickstart
https://www.mono-project.com/docs/getting-started/

Never tested myself though.