ABsoluteMaybe.Persistence.Xml.XmlExperimentCommands.GetOrCreateExperiment C# (CSharp) Method

        public ExperimentSummary GetOrCreateExperiment(string experimentName, string conversionKeyword,
		                                               IEnumerable<string> options)
        {
            var xml = Load();

            var existingExperiment = xml.Root.Elements("Experiment")
                .SingleOrDefault(x => x.Attribute("Name").Value == experimentName);
            if (existingExperiment != null)
                return new ExperimentSummary(
                    existingExperiment.Attribute("Name").Value,
                    existingExperiment.Attribute("AlwaysUseOption") == null
                        ? null
                        : existingExperiment.Attribute("AlwaysUseOption").Value,
                    existingExperiment.Attribute("Ended") != null
                    );

            var exp = new XElement("Experiment",
                                   new XAttribute("Name", experimentName),
                                   new XAttribute("Started", UtcNow),
                                   new XElement("PossibleOptionValues",
                                                options.Select(o => new XElement("Option", new XCData(o)))
                                   	)
                );
            if (experimentName != conversionKeyword)
                exp.Add(new XAttribute("ConversionKeyword", conversionKeyword));
            xml.Root.Add(exp);

            Save(xml);

            return new ExperimentSummary(experimentName, null, false);
        }