currently i am been using following menthod to convert from one time zone to another

TimeZoneInfo cstZone1 = TimeZoneInfo.FindSystemTimeZoneById("India Standard Time");
                TimeZoneInfo cstZone2 = TimeZoneInfo.FindSystemTimeZoneById("UTC");
                DateTime cstTime = TimeZoneInfo.ConvertTimeBySystemTimeZoneId(currdatee, cstZone1.Id.ToString(), cstZone2.Id.ToString());

Is there a way that i can pass the offset value diretly to timezoneinfo e.g +05:30 for India instead of passing the name.