ThreadStatic v.s. ThreadLocal: is generic better than attribute?

Question

[ThreadStatic] is defined using attribute while ThreadLocal uses generic. Why different design solutions were chosen? What are the advan

Answer 1

ThreadStatic Initialize only on first thread, ThreadLocal Initialize for each thread. Below is the simple demonstration:

    public static ThreadLocal _threadlocal =
        new ThreadLocal(() =>
        {
            return Thread.CurrentThread.ManagedThreadId;
        });

    public static void Main()
    {
        new Thread(() =>
        {
            for (int x = 0; x < _threadlocal.Value; x++)
            {
                Console.WriteLine("First Thread: {0}", x);
            }
        }).Start();

        new Thread(() =>
        {
            for (int x = 0; x < _threadlocal.Value; x++)
            {
                Console.WriteLine("Second Thread: {0}", x);
            }
        }).Start();

        Console.ReadKey();
    }