How do you call a method from static main()?

Question

I have a console application with a Main method and a function.

How can I make a function call from the Main method?

I know the code below won't work

static void Main(string[] args)
{            
   string btchid = GetCommandLine();// GetCommandline is a mthod which returns a string
}

Answer 1

There's also

var p = new Program();
string btchid = p.GetCommandLine();

Answer 2

Make the GetCommandLine static!

namespace Lab
{
    public static class Program
    {
        static string GetCommandLine()
        {
            return "Hellow World!";
        }

        static void Main(string[] args)
        {
            System.Console.WriteLine(GetCommandLine());
            System.Console.ReadKey();
        }
    }
}