C# Attribute

#define debug
using System;
using System.Linq;
using System.Diagnostics;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            say();
            Console.ReadKey();

        }
        [Conditional("debug")]
        public static void say()
        {
            Console.WriteLine("aaaa");
        }
    }

}