Merge branch 'master' into jenkinsbuildserver_313

Author: serra

docs/more-info/build-server-setup/myget.md

@@ -1,2 +1,15 @@
 # MyGet
-// TODO Feel free to jump in and contribute
+
+MyGet Build Services has built-in support for GitVersion and is encouraging you to leverage GitVersion + GitFlow to produce Semantically Versioned packages.
+
+* Create a [custom build script](http://docs.myget.org/docs/reference/custom-build-scripts): we advise to run a tool like GitVersion in a *pre-build* script, so that it can set additional environment variables for the actual build script. MyGet [by convention](http://docs.myget.org/docs/reference/build-services#Pre-_and_post-build_steps) automatically picks up any of the following file names as pre-build script: 
+  * `pre-build.(bat|cmd|ps1)`
+  * `pre-myget.(bat|cmd|ps1)`
+* Run `GitVersion /output buildserver`: this will cause MyGet Build Services to set the current `%PackageVersion%` value to the NuGet-compatible SemVer generated by GitVersion and apply this [MyGet Environment Variable](http://docs.myget.org/docs/reference/build-services#Available_Environment_Variables) wherever it is used during the build process.
+* Ensure the build script has been pushed to your source repository root. Done :)
+
+Note: If you require the `AssemblyInfo.cs` files in your project to be patched with the information from GitVersion, you will have to run it manually, for example using the command: 
+
+`call %GitVersion% /updateassemblyinfo true`.
+
+Also check [docs.myget.org](http://docs.myget.org/docs/reference/build-services#GitVersion_and_Semantic_Versioning) for the latest full info.

src/GitVersionTask/DirectoryDateFinder.cs

@@ -1,19 +1,15 @@
-using System;
-using System.IO;
+using System.IO;
+using System.Linq;
 
 public static class DirectoryDateFinder
 {
     public static long GetLastDirectoryWrite(string path)
     {
-        var lastHigh = DateTime.MinValue;
-        foreach (var file in Directory.EnumerateDirectories(path, "*.*", SearchOption.AllDirectories))
-        {
-            var lastWriteTime = File.GetLastWriteTime(file);
-            if (lastWriteTime > lastHigh)
-            {
-                lastHigh = lastWriteTime;
-            }
-        }
-        return lastHigh.Ticks;
+        return new DirectoryInfo(path)
+            .GetDirectories("*.*", SearchOption.AllDirectories)
+            .Select(d => d.LastWriteTimeUtc)
+            .DefaultIfEmpty()
+            .Max()
+            .Ticks;
     }
 }