C#で日本時間取得

            DateTime utc_input = System.DateTime.UtcNow;
            TimeZoneInfo jstZoneInfo = System.TimeZoneInfo.FindSystemTimeZoneById("Tokyo Standard Time");
            DateTime jst = System.TimeZoneInfo.ConvertTimeFromUtc(utc_input, jstZoneInfo);

ネタ元

• https://www.ipentec.com/document/csharp-convert-utc-jst