using System;

public class Program

{

    public class MyClass{

        public bool? MyProp {get;set;}

    }

    public static void Main()

    {

        MyClass myClass = new MyClass();

        if(myClass.MyProp==true)

        {

            Console.Write("Value is True");

        }

        if(myClass.MyProp==false)

        {

            Console.Write("Value is false");

        }

        if(myClass.MyProp==null)

        {

            Console.Write("Value is null");

        }

    }

}