Trying to understand ?. (null-conditional) operator in C#

Question

I have this very simple example:

class Program
{
    class A
    {
        public bool B;
    }

    static void Main()
    {
        System.Collections.ArrayLis         


        

Answer 1

• list?.Count > 0: Here you compare an int? to an int, yielding a bool, since lifted comparison operators return a bool, not a bool?.
• a?.B: Here, you have a bool?. if, however, requires a bool.