Testing threadpool behavior

Program.cs

using System;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;

namespace ThreadPoolLogger
{
    class Program
    {
        const int ThreadChange = 40;
        static async Task Main(string[] args)
        {
            LogAvailableThreads();
            Console.WriteLine();
            LogMinMaxConfiguration();

            Console.WriteLine();
            var success = ThreadPool.SetMinThreads(
                workerThreads: ThreadChange,
                completionPortThreads: ThreadChange
            );
            Console.WriteLine($"Setting minimum worker and IOCP threads to {ThreadChange}: {success}");
            Console.WriteLine();

            LogMinMaxConfiguration();

            Console.WriteLine();
            Console.WriteLine(DateTime.Now.ToLongTimeString() + ": Doing some work... please wait 15 seconds");
            await Task.WhenAll(
                Enumerable
                    .Range(1, 100)
                    .Select(async i =>
                    {
                        await Task.Delay(TimeSpan.FromSeconds(5));  // async delay -- IOCP
                        Thread.Sleep(TimeSpan.FromSeconds(10));     // blocking delay
                    })
            );
            Console.WriteLine(DateTime.Now.ToLongTimeString() + ": Work done.");
            LogAvailableThreads();
        }

        private static void LogMinMaxConfiguration()
        {
            ThreadPool.GetMinThreads(out int minWorkerThreads, out int minIoCompletionPortThreads);
            Console.WriteLine($"Minimum Worker Threads: {minWorkerThreads}, Minimum IOCP Threads: {minIoCompletionPortThreads}");

            ThreadPool.GetMaxThreads(out int maxWorkerThreads, out int maxIoCompletionPortThreads);
            Console.WriteLine($"Maximum Worker Threads: {maxWorkerThreads}, Maximum IOCP Threads: {maxIoCompletionPortThreads}");
        }

        private static void LogAvailableThreads()
        {
            ThreadPool.GetAvailableThreads(out int currentWorkerThreads, out int currentIoCompletionPortThreads);
            Console.WriteLine($"Available Worker Threads: {currentWorkerThreads}, Available IOCP Threads: {currentIoCompletionPortThreads}");
        }
    }
}