class LazySingleton
    {
        private static readonly Lazy<LazySingleton> _instance =
            new Lazy<LazySingleton>(() => new LazySingleton());

        private LazySingleton() { }

        public static LazySingleton Instance
        {
            get
            {
                return _instance.Value;
            }
        }
        public void Test()
        {
            Console.WriteLine("blabla");
        }
    }