using System;

public class Program

{

    public static void Main()

    {

        bool? var1 = true;

        bool? var2 = true;

        if (var1 == var2)

        {

            Console.WriteLine("var1 equals to var2");

        }

        var2 = null;

        if (var1 != var2)

        {

            Console.WriteLine("var1 is not equal to var2");

        }

    }

}