using System;

using System.Threading;

public class Program {

    static void Main(string[] args) {

        Console.WriteLine("Hello");

        Thread.Sleep(1000);

​

        Console.WriteLine("==Execute LowCost==");

        Console.WriteLine(MyStatic.LowCostMethod());

        Thread.Sleep(1000);

​

        Console.WriteLine("==Execute HighCost==");

        Console.WriteLine(MyStatic.X);

        Console.WriteLine(MyStatic.Y);

    }

​

    public static class MyStatic {

        private static readonly Lazy<double> _highCost = new Lazy<double>(HighCostMethod);

        public static double HighCostMethod() {

            Console.WriteLine("HIGH COST!!");

            Thread.Sleep(3000);

            return DateTime.Now.ToOADate();

        }

​

        public static double X = Math.Sin(_highCost.Value);

        public static double Y = Math.Abs(_highCost.Value);

        public static string LowCostMethod() {

            return "LOW COST";

        }

    }

}