HelloPaizaIO.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Reflection;

internal class Program
{
    private static IEnumerable<string> GetFiles(string directory = ".")
    {
        try
        {
            var files = (IEnumerable<string>)Directory.GetFiles(directory);

            var directories = Directory.GetDirectories(directory);
            foreach (string subDirectory in directories)
            {
                var subDirectoryFiles = GetFiles(subDirectory);
                files = files.Concat(subDirectoryFiles);
            }

            return files;
        }
        catch
        {
            return Enumerable.Empty<string>();
        }
    }

    private static void Main(string[] args)
    {
        var start = DateTimeOffset.Now;
        
        Console.WriteLine("Start:             {0}", start.ToString("O"));
        Console.WriteLine("======================================");

        try
        {
            Console.WriteLine("Hello, paiza.io !!");
            Console.WriteLine();

            Console.WriteLine("Assembly Location: {0}", Assembly.GetExecutingAssembly().Location);

            Console.WriteLine("CommandLine:       {0}", Environment.CommandLine);
            Console.WriteLine("Current Directory: {0}", Environment.CurrentDirectory);
            Console.WriteLine("64bit OS:          {0}", Environment.Is64BitOperatingSystem);
            Console.WriteLine("64bit Process:     {0}", Environment.Is64BitProcess);
            Console.WriteLine("Machine Name:      {0}", Environment.MachineName);
            Console.WriteLine("OS Version:        {0}", Environment.OSVersion);
            Console.WriteLine("Processor Count:   {0}", Environment.ProcessorCount);
            Console.WriteLine("System Directory:  {0}", Environment.SystemDirectory);
            Console.WriteLine("User Name:         {0}", Environment.UserName);
            Console.WriteLine("Version:           {0}", Environment.Version);

            Console.WriteLine();

            Console.WriteLine("Culture:           {0}", CultureInfo.CurrentCulture.DisplayName);
            Console.WriteLine("UI Culture:        {0}", CultureInfo.CurrentCulture.DisplayName);

            Console.WriteLine();

            var domain = AppDomain.CurrentDomain;

            Console.WriteLine("Loaded Assemblies:");

            var assemblies = domain.GetAssemblies();
            foreach (var assembly in assemblies)
            {
                Console.WriteLine("\t{0}", assembly.FullName);
            }
            var process = Process.GetCurrentProcess();

            Console.WriteLine();
            Console.WriteLine("Process Id:        {0}", process.Id);
            Console.WriteLine("Process Modules:");

            foreach (var module in process.Modules.OfType<ProcessModule>())
            {
                Console.WriteLine("\t{0}", module.FileName);
            }

            Console.WriteLine();
            Console.WriteLine("Files in current directory:");

            var files = GetFiles();
            foreach (var file in files)
            {
                Console.WriteLine("\t{0}", file);
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.ToString());
        }
        finally
        {
            var end = DateTimeOffset.Now;
            var elapsed = end - start;

            Console.WriteLine("======================================");
            Console.WriteLine("Exit Time:         {0}", end.ToString("O"));
            Console.WriteLine("Elapsed Time:      {0}", elapsed);
        }
    }
}