DesktopAnalytics.Analytics.Analytics C# (CSharp) Method

		public Analytics(string apiSecret, UserInfo userInfo, Dictionary<string, string> propertiesThatGoWithEveryEvent, bool allowTracking = true)
		{
			if (_singleton != null)
			{
				throw new ApplicationException("You can only construct a single Analytics object.");
			}
			_singleton = this;
			_propertiesThatGoWithEveryEvent = propertiesThatGoWithEveryEvent;

			_userInfo = userInfo;

			AllowTracking = allowTracking;
			//UrlThatReturnsExternalIpAddress is a static and should really be set before this is called, so don't mess with it if the client has given us a different url to us
			if (string.IsNullOrEmpty(UrlThatReturnsExternalIpAddress))
				UrlThatReturnsExternalIpAddress = "http://icanhazip.com"; //went down: "http://ipecho.net/plain";

			if (!AllowTracking)
				return;


			//bring in settings from any previous version
			if (AnalyticsSettings.Default.NeedUpgrade)
			{
				//see http://stackoverflow.com/questions/3498561/net-applicationsettingsbase-should-i-call-upgrade-every-time-i-load
				AnalyticsSettings.Default.Upgrade();
				AnalyticsSettings.Default.NeedUpgrade = false;
				AnalyticsSettings.Default.Save();
			}

			if (string.IsNullOrEmpty(AnalyticsSettings.Default.IdForAnalytics))
			{
				// Apparently a first-time install. Any chance we can migrate settings from another channel of this app?
				// We really want to use the same ID if possible to keep our statistics valid.
				try
				{
					AttemptToGetUserIdSettingsFromDifferentChannel();
				}
				catch (Exception)
				{
					// Oh, well, we tried.
				}
			}

			Segment.Analytics.Initialize(apiSecret);
			Segment.Analytics.Client.Failed += Client_Failed;
			Segment.Analytics.Client.Succeeded += Client_Succeeded;

			if (string.IsNullOrEmpty(AnalyticsSettings.Default.IdForAnalytics))
			{

				AnalyticsSettings.Default.IdForAnalytics = Guid.NewGuid().ToString();
				AnalyticsSettings.Default.Save();
			}

			var context = new Context();
			context.Add("language", _userInfo.UILanguageCode);

			_options = new Options();
			_options.SetContext(context);

			UpdateSegmentIOInformationOnThisUser();
			ReportIpAddressOfThisMachineAsync(); //this will take a while and may fail, so just do it when/if we can
			string versionNumberWithBuild = "";
			try
			{
				versionNumberWithBuild = System.Reflection.Assembly.GetEntryAssembly().GetName().Version.ToString();
			}
			catch (NullReferenceException)
			{
				try
				{
					// GetEntryAssembly is null for MAF plugins
					versionNumberWithBuild = System.Reflection.Assembly.GetExecutingAssembly().GetName().Version.ToString();
				}
				catch (NullReferenceException)
				{
					// This probably can't happen, but if it does, just roll with it.
				}
			}
			string versionNumber = versionNumberWithBuild.Split('.').Take(2).Aggregate((a, b) => a + "." + b);
			SetApplicationProperty("Version", versionNumber);
			SetApplicationProperty("FullVersion", versionNumberWithBuild);
			SetApplicationProperty("UserName", GetUserNameForEvent());
			SetApplicationProperty("Browser", GetOperatingSystemLabel());


			if (string.IsNullOrEmpty(AnalyticsSettings.Default.LastVersionLaunched))
			{
				//"Created" is a special property that segment.io understands and coverts to equivalents in various analytics services
				//So it's not as descriptive for us as "FirstLaunchOnSystem", but it will give the best experience on the analytics sites.
				TrackWithApplicationProperties("Created");
			}
			else if (AnalyticsSettings.Default.LastVersionLaunched != versionNumberWithBuild)
			{
				TrackWithApplicationProperties("Upgrade", new Properties
				{
					{"OldVersion", AnalyticsSettings.Default.LastVersionLaunched},
				});
			}

			// We want to record the launch event independent of whether we also recorded a special first launch
			// But that is done after we retrieve (or fail to retrieve) our external ip address.
			// See http://issues.bloomlibrary.org/youtrack/issue/BL-4011.

			AnalyticsSettings.Default.LastVersionLaunched = versionNumberWithBuild;
			AnalyticsSettings.Default.Save();

		}