C# Thread.IsAlive test

ThreadIsAliveTest.cs

//C# Interactive code. (Ctrl + E, Ctrl + E)
using System.Threading;
volatile bool stop = false;
Thread thread = new Thread(() => {
    while (stop == false)
    {
        Thread.Sleep(500);
        Console.WriteLine(DateTime.Now);
    }
    Console.WriteLine("Finished");
});
Task.Delay(5 * 1000).ContinueWith(x => { stop = true; });
thread.Start();
Thread.Sleep(100);
while (thread.IsAlive) {
    Thread.Sleep(100);
    Console.WriteLine("Still working");
}
Console.WriteLine("Heyooo!");