Try This:
DateTime utcdate = DateTime.ParseExact("6/15/2014 12:00:00 AM", "M/dd/yyyy
h:mm:ss tt",CultureInfo.InvariantCulture);
var istdate = TimeZoneInfo.ConvertTimeFromUtc(utcdate,
TimeZoneInfo.FindSystemTimeZoneById("India Standard Time"));
I'm getting output :
6/15/2014 5:30:00 AM