MySql.Data.MySqlClient.MySqlDataReader.GetGuid C# (CSharp) Method

    public override Guid GetGuid(int i)
    {
      object v = GetValue(i);
      if (v is Guid)
        return (Guid)v;
      if (v is string)
        return new Guid(v as string);
      if (v is byte[])
      {
        byte[] bytes = (byte[])v;
        if (bytes.Length == 16)
          return new Guid(bytes);
      }
      Throw(new MySqlException(Resources.ValueNotSupportedForGuid));
      return Guid.Empty; // just to silence compiler
    }

 private static void _mediaReadFields(MySqlDataReader dataReader, PersistentMedia media)
 {
     uint flags = dataReader.IsDBNull(dataReader.GetOrdinal("flags")) ? (uint)0 : dataReader.GetUInt32("flags");
     byte typVideo = dataReader.IsDBNull(dataReader.GetOrdinal("typVideo")) ? (byte)0 : dataReader.GetByte("typVideo");
     media._mediaName = dataReader.IsDBNull(dataReader.GetOrdinal("MediaName")) ? string.Empty : dataReader.GetString("MediaName");
     media._duration = dataReader.IsDBNull(dataReader.GetOrdinal("Duration")) ? default(TimeSpan) : dataReader.GetTimeSpan("Duration");
     media._durationPlay = dataReader.IsDBNull(dataReader.GetOrdinal("DurationPlay")) ? default(TimeSpan) : dataReader.GetTimeSpan("DurationPlay");
     media._folder = dataReader.IsDBNull(dataReader.GetOrdinal("Folder")) ? string.Empty : dataReader.GetString("Folder");
     media._fileName = dataReader.IsDBNull(dataReader.GetOrdinal("FileName")) ? string.Empty : dataReader.GetString("FileName");
     media._fileSize = dataReader.IsDBNull(dataReader.GetOrdinal("FileSize")) ? 0 : dataReader.GetUInt64("FileSize");
     media.idFormat = dataReader.IsDBNull(dataReader.GetOrdinal("idFormat")) ? 0 : dataReader.GetUInt64("idFormat");
     media._lastUpdated = _readDateTimeField(dataReader, "LastUpdated");
     media._mediaStatus = (TMediaStatus)(dataReader.IsDBNull(dataReader.GetOrdinal("statusMedia")) ? 0 : dataReader.GetInt32("statusMedia"));
     media._mediaType = (TMediaType)(dataReader.IsDBNull(dataReader.GetOrdinal("typMedia")) ? 0 : dataReader.GetInt32("typMedia"));
     media._tCStart = dataReader.IsDBNull(dataReader.GetOrdinal("TCStart")) ? default(TimeSpan) : dataReader.GetTimeSpan("TCStart");
     media._tCPlay = dataReader.IsDBNull(dataReader.GetOrdinal("TCPlay")) ? default(TimeSpan) : dataReader.GetTimeSpan("TCPlay");
     media.idProgramme = dataReader.IsDBNull(dataReader.GetOrdinal("idProgramme")) ? 0 : dataReader.GetUInt64("idProgramme");
     media._audioVolume = dataReader.IsDBNull(dataReader.GetOrdinal("AudioVolume")) ? 0 : dataReader.GetDecimal("AudioVolume");
     media._audioLevelIntegrated = dataReader.IsDBNull(dataReader.GetOrdinal("AudioLevelIntegrated")) ? 0 : dataReader.GetDecimal("AudioLevelIntegrated");
     media._audioLevelPeak = dataReader.IsDBNull(dataReader.GetOrdinal("AudioLevelPeak")) ? 0 : dataReader.GetDecimal("AudioLevelPeak");
     media._audioChannelMapping = dataReader.IsDBNull(dataReader.GetOrdinal("typAudio")) ? TAudioChannelMapping.Stereo : (TAudioChannelMapping)dataReader.GetByte("typAudio");
     media.HasExtraLines = (typVideo & (byte)0x80) > 0;
     media._videoFormat = (TVideoFormat)(typVideo & 0x7F);
     media._idAux = dataReader.IsDBNull(dataReader.GetOrdinal("idAux")) ? string.Empty : dataReader.GetString("idAux");
     media._killDate = _readDateTimeField(dataReader, "KillDate");
     media._mediaGuid = dataReader.IsDBNull(dataReader.GetOrdinal("MediaGuid")) ? Guid.Empty : dataReader.GetGuid("MediaGuid");
     media._mediaEmphasis = (TMediaEmphasis)((flags >> 8) & 0xF);
     media._parental = (TParental)((flags >> 12) & 0xF);
     if (media is ServerMedia)
         ((ServerMedia)media)._doNotArchive = (flags & 0x1) != 0;
     media._mediaCategory = (TMediaCategory)((flags >> 4) & 0xF); // bits 4-7 of 1st byte
 }