Update test runner

Author: PaulStovell

examples/03-CreateAppPool/Web.ps1

@@ -25,7 +25,7 @@ if ($pool -eq $null) {
 
     # Older applications may require "Classic" mode, but most modern ASP.NET
     # apps use the integrated pipeline
-    Set-ItemProperty -Path "IIS:\AppPools\My Pool 3" -name "managedPipelineMode" -value "Integrated"
+    Set-ItemProperty -Path "IIS:\AppPools\My Pool 3" -name "managedPipelineMode" -value Integrated
 
     # What version of the .NET runtime to use. Valid options are "v2.0" and 
     # "v4.0". IIS Manager often presents them as ".NET 4.5", but these still 

src/ExampleRunner/Program.cs

@@ -16,12 +16,22 @@ class Program
         static readonly string OutputFile = Path.GetFullPath("..\\..\\..\\..\\out.md");
         static readonly Regex FileNameFilterRegex = new Regex("^[^_].*README\\.md$", RegexOptions.IgnoreCase);
 
-        static void Main(string[] args)
+        static int Main(string[] args)
         {
             Initialize();
             EnsureExamplesDirectory();            
             GenerateDocumentation();
             RunAllExamples();
+
+            if (TeamCitySink.Errors != 0)
+            {
+                Console.WriteLine("Failed {0} errors", TeamCitySink.Errors);
+            }
+            else
+            {
+                Console.WriteLine("Success!");
+            }
+            return TeamCitySink.Errors;
         }
 
         static void Initialize()

src/ExampleRunner/TeamCitySink.cs

@@ -1,15 +1,20 @@
 using System;
+using System.Threading;
 using Serilog.Core;
 using Serilog.Events;
 
 namespace ExampleRunner
 {
     class TeamCitySink : ILogEventSink
     {
+        public static int Errors = 0;
+
         public void Emit(LogEvent logEvent)
         {
             if (logEvent.Level >= LogEventLevel.Warning)
             {
+                Interlocked.Increment(ref Errors);
+
                 var formatter = new JetBrains.TeamCity.ServiceMessages.Write.ServiceMessageFormatter();
                 var formatted = formatter.FormatMessage("message",
                     new