namespace ThreadsExample
{
    internal class ThreadFunctions
    {
        public static void ThreadExample()
        {
            Console.WriteLine("Start the secondary Thread");
            Console.WriteLine("Id for secondary Thread: {0}", Environment.CurrentManagedThreadId);
            Console.ForegroundColor = ConsoleColor.Yellow;

            for (int i = 0; i < 10; ++i) 
            {
                Thread.Sleep(25);
                Console.Write(".");
            }
            Console.ForegroundColor = ConsoleColor.Green;
            Console.WriteLine("Secondary thread finished");
        }
    }
}

using ThreadsExample;

Thread thread = new(new ThreadStart(ThreadFunctions.ThreadExample));

Console.WriteLine("Id for the primary thread {0} \n", Thread.CurrentThread.GetHashCode());
Console.WriteLine("Start for the primary thread..");

thread.Start();

Console.WriteLine(Thread.CurrentThread.GetHashCode());

Console.ForegroundColor = ConsoleColor.Gray;

for (int i = 0; i < 10; ++i)
{
    Thread.Sleep(25);
    Console.Write("-");
}
Console.ForegroundColor = ConsoleColor.Magenta;
Console.WriteLine("\nPrimary finished");
Console.ReadLine();