Can't I do it this way...?

Question

Start
Print "Hello World"
Stop

Answer 1

This can be an answer for you : http://rextester.com/l/csharp_online_compiler

Answer 2

You need to make use of C# codes
where you start with the main method open curly bracket{
Console.WriteLine("Hello World");
Console.Readkey();
} close curly bracket