C#

Installing C#

--> check to see if it is already installed!

mcs --version

sudo apt update && sudo apt full-upgrade -y
sudo apt install mono-devel
mcs --version

"Hello, World!" in C#

--> create a file called HelloWorld.cs

namespace HelloWorld

{

    class Hello {         

        static void Main(string[] args)

        {

            System.Console.WriteLine("Hello World!");

        }

    }

}

Compile & Run

mcs -out:hello.exe hello_world.cs

mono hello_world.exe