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_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones"));
             set.Assert();
             using (RegistryKey key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time 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[] { @"SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time 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;
         }