c

  class Program
    {
        static void Main(string[] args)
        {
            var value = GetObject();

            if (value is bool?)
            {
                Console.WriteLine("true");
            }
            else
            {
                Console.WriteLine("false");
            }

            Console.ReadLine();
        }

        public static object GetObject()
        {
            return (bool)true;
        }
    }