Which values can the variable 'x' have in the code below, and why? Hint: compile in release mode if you want to try it...

code-quiz-001.cs

using System;
using System.Threading.Tasks;

namespace CodeQuiz
{
    class Program
    {
        static void Main()
        {
            ulong sharedValue = 0;
            var tasks = new[]
            {
                    Task.Run(() =>
                    {
                        var v = true;
                        while (true)
                        {
                            sharedValue = v ? 0x0L : ulong.MaxValue;
                            v = !v;
                        }
                    }),
                    Task.Run(() =>
                    {
                        while (true)
                        {
                            var x = sharedValue;
                            Console.WriteLine($"x = {x:X16}");
                        }
                    })
                };

            var completed = Task.WaitAny(tasks);
        }
    }
}