Handles starting/stopping IIS Express for your black-box systemtests (Relative path hardcoded - look for {YOURWEBPROJECTROOTFOLDER})

Example how to hook up Test to IISExpress class

    [SetUpFixture] //NUnit's   "before all tests"
    public class SystemTestInit
    {
        private IISExpress iis;

        [SetUp]
        public void Init()
        {
            if (iis != null)
              throw new InvalidOperationException("IIS express is already configured!");

            IISExpress.KillAllIISExpressInstancesCurrentlyRunning();
            iis = IISExpress.Start();            
        }
    }

IISExpress.cs

using NUnit.Framework;
using System;
using System.Diagnostics;
using System.IO;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace ProjectName.Tests.System
{
    class IISExpress
    {
        public const int PortNumber = 51888;

        internal class NativeMethods
        {
            // Methods
            [DllImport("user32.dll", SetLastError = true)]
            internal static extern IntPtr GetTopWindow(IntPtr hWnd);
            [DllImport("user32.dll", SetLastError = true)]
            internal static extern IntPtr GetWindow(IntPtr hWnd, uint uCmd);
            [DllImport("user32.dll", SetLastError = true)]
            internal static extern uint GetWindowThreadProcessId(IntPtr hwnd, out uint lpdwProcessId);
            [DllImport("user32.dll", SetLastError = true)]
            internal static extern bool PostMessage(HandleRef hWnd, uint Msg, IntPtr wParam, IntPtr lParam);
        }

        public static void KillAllIISExpressInstancesCurrentlyRunning()
        {
            Process[] localByName = Process.GetProcessesByName("iisexpresstray"); //IIS Express System Tray
            foreach(var p in localByName)
            {
                p.Kill();
            }
        }

        public static void SendStopMessageToProcess(int PID)
        {
            try
            {
                for (IntPtr ptr = NativeMethods.GetTopWindow(IntPtr.Zero); ptr != IntPtr.Zero; ptr = NativeMethods.GetWindow(ptr, 2))
                {
                    uint num;
                    NativeMethods.GetWindowThreadProcessId(ptr, out num);
                    if (PID == num)
                    {
                        HandleRef hWnd = new HandleRef(null, ptr);
                        NativeMethods.PostMessage(hWnd, 0x12, IntPtr.Zero, IntPtr.Zero);
                        return;
                    }
                }
            }
            catch (ArgumentException)
            {
            }
        }

        const string IIS_EXPRESS = @"C:\Program Files\IIS Express\iisexpress.exe";
        const string PORT = "port";
        const string PATH = "path";
        const string APP_POOL = "apppool";

        Process process;

        IISExpress(string path)
        {
            StringBuilder arguments = new StringBuilder();
            arguments.AppendFormat("/{0}:{1} ", PORT, PortNumber);
            arguments.AppendFormat("/{0}:{1} ", PATH, path);            

            process = Process.Start(new ProcessStartInfo()
            {
                FileName = IIS_EXPRESS,
                Arguments = arguments.ToString(),
                RedirectStandardOutput = true,
                UseShellExecute = false,
                WorkingDirectory = TestContext.CurrentContext.TestDirectory,
                CreateNoWindow = true     
            });

            Task.Run(() =>
            {
                while (!process.StandardOutput.EndOfStream)
                {
                    string line = process.StandardOutput.ReadLine();
                    Console.WriteLine("IISEXPRESS: {0}", line);
                }

            });
            
        }

        public string Config { get; protected set; }
        public string Site { get; protected set; }
        public string AppPool { get; protected set; }

        public static IISExpress Start()
        {
            var siteDir = Path.GetFullPath(Path.Combine(TestContext.CurrentContext.TestDirectory, "..\\..\\..\\..", "Source\\{YOURWEBPROJECTROOTFOLDER}"));
            return new IISExpress(siteDir);
        }

        public void Stop()
        {
            SendStopMessageToProcess(process.Id);
            process.Close();
        }
    }
}