How to properly delay Task?

Question

C++ / C#

Good afternoon. In a console application, it is required to implement a very simple timer that would call the desired method in another thread in a second and the result of the method would be displayed on the console.
I tried to do it like this.

class Program
    {
        static void Main(string[] args)
        {
            Test t = new Test();

            Console.WriteLine("Before task");

            Task.Run(() =>
            {
                while (true)
                {
                    Console.WriteLine(t.GetTime());
                    Task.Delay(1000);
                }
            });

            Console.WriteLine("After task");

            Console.ReadKey();
        }
    }

    public class Test
    {
        public string GetTime()
        {
            return DateTime.Now.ToLongTimeString();
        }
    }

I get this picture.

spoiler

It is worth changing Task.Delay to Thread.Sleep, then I get the result I need.

spoiler

How to correctly interrupt Task and achieve the desired result. Thanks in advance for your replies.