Simplest way to process a list of items in a multi-threaded manner

using (IDataReader dr = q.ExecuteReader())
        {
            ThreadPool.SetMaxThreads(10, 10);
            int workerThreads = 0;
            int completionPortThreads = 0;
            while (dr.Read())
            {
                do
                {
                    ThreadPool.GetAvailableThreads(out workerThreads, out completionPortThreads);

                    if (workerThreads == 0)
                    {
                        Thread.Sleep(100);
                    }
                } while (workerThreads == 0);

                Database.Log l = new Database.Log();
                l.Load(dr);

                ThreadPool.QueueUserWorkItem(delegate(object threadContext)
                {
                    Database.Log log = threadContext as Database.Log;
                    Scraper scraper = new Scraper();
                    dc.Product p = scraper.GetProduct(log, log.Url, true);
                    ManualResetEvent done = new ManualResetEvent(false);
                    done.Set();
                }, l);
            }
        }