Console output with C#

sh64.cs

using System;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Threading;

namespace ConsoleApplication1
{
	class App
	{
		static int Main(string[] args)
		{
			Console.WriteLine("sh64 args: " + string.Join(", ", args));
			var start = new ProcessStartInfo
				{
					FileName = args.First(),
					Arguments = string.Join(" ", args.Skip(1).ToArray()),
					UseShellExecute = false,
					RedirectStandardOutput = true,
					RedirectStandardError = true,
					RedirectStandardInput = false,
					CreateNoWindow = true
				};

			using (var process = Process.Start(start))
			{
				while (!process.HasExited)
				{
					using (var reader = process.StandardOutput)
						Drain(reader, false);
					using (var reader = process.StandardError)
						Drain(reader, true);
				}
				process.WaitForExit();
				return process.ExitCode;
			}
		}

		static void Drain(TextReader reader, bool error)
		{
			ColourizeError(error, () =>
				{
					var buf = new char[256];
					int read;
					while ((read = reader.Read(buf, 0, buf.Length)) != 0)
						Console.Write(new string(buf, 0, read));
				});
		}

		static void ColourizeError(bool error, Action a)
		{
			var prev = Console.ForegroundColor;
			Console.ForegroundColor = error ? ConsoleColor.Red : ConsoleColor.White;
			var mre = new ManualResetEventSlim(false);
			try
			{
				a();
			}
			finally
			{
				Console.ForegroundColor = prev;
				mre.Set(); // runs on GC thread on servers and is reentrant/interleaved concurrency in workstations!
			}
			mre.Wait();
		}
	}
}

csc /out:"buildscripts\sh64.exe" .\buildscripts\sh64.cs /platform:x64

This will wrap 64 bit powershell commands properly, including stderr and stdout, interleaved (to some extent at least, interleaving in a not-so-nice-way might occurr)

This solves this error:
No snap-ins have been registered for Windows PowerShell version 2 by running powershell w/ a 64-bit executable.