C# 中获取时区列表

• c#中获取时区列表 下面方法获得的仅仅用来显示和使用，无法用来进行时间转换。

     
public static List<DisplayTimeZone> GetSystemTimeZones()
        {
            List<DisplayTimeZone> list = new List<DisplayTimeZone>();

            PermissionSet set = new PermissionSet(PermissionState.None);
            set.AddPermission(new RegistryPermission(RegistryPermissionAccess.Read, @"HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionTime Zones"));
            set.Assert();
            using (RegistryKey key = Registry.LocalMachine.OpenSubKey(@"SOFTWAREMicrosoftWindows NTCurrentVersionTime Zones", RegistryKeyPermissionCheck.Default, RegistryRights.ExecuteKey))
            {
                if (key != null)
                {
                    foreach (string str in key.GetSubKeyNames())
                    {
                        DisplayTimeZone timeZone = null;
                        Exception e = null;
                        TryGetTimeZone(str, out timeZone, out e);
                        if (timeZone != null)
                        {
                            list.Add(timeZone);
                        }
                    }
                }
            }
            return list;
        }

        private static void TryGetTimeZone(string id, out DisplayTimeZone value, out Exception e)
        {
            e = null;
            value = new DisplayTimeZone();
            try
            {
                using (RegistryKey key = Registry.LocalMachine.OpenSubKey(string.Format(CultureInfo.InvariantCulture, @"{0}{1}", new object[] { @"SOFTWAREMicrosoftWindows NTCurrentVersionTime Zones", id }), RegistryKeyPermissionCheck.Default, RegistryRights.ExecuteKey))
                {
                    value.DisplayName = key.GetValue("Display", string.Empty, RegistryValueOptions.None) as string;
                    value.StandardName = key.GetValue("Std", string.Empty, RegistryValueOptions.None) as string;
                    value.DaylightName = key.GetValue("Dlt", string.Empty, RegistryValueOptions.None) as string;
                }
            }
            catch (Exception ex)
            {
                e = ex;
                value = null;
            }
        }

        public class DisplayTimeZone
        {
            public string StandardName;
            public string DisplayName;
            public string DaylightName;
        }