Answer 1

https://code.sololearn.com/cjSp52xC6UY3/?ref=app

Tom Price you have actually missed the basic structure of the program

Just go through this edited code

you will be able to understand how the variables are declared and how you can output the result

Answer 2

https://www.sololearn.com/Course/CSharp/?ref=app

I request you to start learning C# course which is available on sololearn

So you will be able to learn the basic syntax and how to run the code 👇🏻

Answer 3

Try your first code "How to print hello word" in any programming languages...
and write syntax carefully