tbf/AppDiagnostic/LogColorRuleRepository.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Xml.Serialization;

namespace AppDiagnostic
{
    public static class LogColorRuleRepository
    {
        private static readonly string settingsFolder = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "Sensus", "AppDiagnostic");
        private static readonly string settingsPath = Path.Combine(settingsFolder, "color-rules.xml");

        public static List<LogColorRule> Load()
        {
            try
            {
                if (!File.Exists(settingsPath))
                {
                    return LogColorRule.CreateDefaults();
                }

                var serializer = new XmlSerializer(typeof(List<LogColorRule>));
                using (FileStream stream = File.OpenRead(settingsPath))
                {
                    var rules = serializer.Deserialize(stream) as List<LogColorRule>;
                    return rules == null || rules.Count == 0 ? LogColorRule.CreateDefaults() : rules;
                }
            }
            catch
            {
                return LogColorRule.CreateDefaults();
            }
        }

        public static void Save(IEnumerable<LogColorRule> rules)
        {
            Directory.CreateDirectory(settingsFolder);

            var serializer = new XmlSerializer(typeof(List<LogColorRule>));
            using (FileStream stream = File.Create(settingsPath))
            {
                serializer.Serialize(stream, new List<LogColorRule>(rules));
            }
        }
    }
}