Simple MVC app that posts Librato annotations on startup and shutdown

MvcApplication.cs

using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Configuration;
using System.Diagnostics;
using System.Net;
using System.Web;
using System.Web.Hosting;
using System.Web.Http;
using System.Web.Mvc;
using System.Web.Routing;

namespace LibratoAnnotationTest
{
	public class MvcApplication : HttpApplication
	{
		protected void Application_Start()
		{
			AreaRegistration.RegisterAllAreas();
			WebApiConfig.Register(GlobalConfiguration.Configuration);
			FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
			RouteConfig.RegisterRoutes(RouteTable.Routes);

			SendLibratoAnnotation("Worker started",
				string.Format("Commit id is {0}", ConfigurationManager.AppSettings["appharbor.commit_id"]));
		}

		protected void Application_End(object sender, EventArgs e)
		{
			var privateMemorySize =  Process.GetCurrentProcess().PrivateMemorySize64;
			SendLibratoAnnotation("Worker shutdown",
				string.Format("Reason {0}. Private memory usage: {1} MB",
					HostingEnvironment.ShutdownReason, privateMemorySize / 1024 / 1024));
		}

		private static void SendLibratoAnnotation(string title, string description)
		{
			using (var webClient = new WebClient())
			{
				var appSettings = ConfigurationManager.AppSettings;
				webClient.Credentials = new NetworkCredential(appSettings["LIBRATO_USER"], appSettings["LIBRATO_TOKEN"]);
				webClient.UploadValues(new Uri("https://metrics-api.librato.com/v1/annotations/deployments"), new NameValueCollection
				{
					{ "title", title },
					{ "source", appSettings["appharbor.worker_name"] },
					{ "description", description },
				});
			}
		}
	}
}