WinApi TimeZoneInfo returns bad value

Question

It seems I found a bug in WinApi. When I use TimeZoneInfo.Local.DisplayName in Debug in my Visual Studio 2015, it returns the correct option to me, for example, "(UTC + 02: 00) Helsinki, Kiev, Riga, Sofia, Tallinn, Vilnius". In release mode (.net native), the same api returns me "FLE Standard Time". Be healthy to learn how to get time zone information in another way or how to fix this problem.

Answer 1

Most likely, you missed something in your code. One mistake I made earlier, and easy to make, confuses DisplayName with DaylightName :

  static void Main(string[] args) { var timeZoneName = TimeZoneInfo.Local.DaylightName; //FLE Standard Time var displayName = TimeZoneInfo.Local.DisplayName; //(UTC+02:00) Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius } 

For reference, you can check the timezone identifiers