General

You can try with the below url:

https://dotnetfiddle.net/

Here you can write and execute the .Net code. You can share it publicly.

This is knowledge sharing site. If you have some code that is useful for others then you can post in code snippet section.

Francis Susaimichael10y ago

This site offers tutorials and forums which helps to other members to learn about .Net technologies. I don't know where you are going to "write" your code. This site doesn't offer those kind of facility.