MongoDB.Bson.IO.BsonWriter.WriteDateTime C# (CSharp) Method

        public abstract void WriteDateTime(long value);

        public override void Serialize(
            BsonWriter bsonWriter,
            Type nominalType,
            object value,
            IBsonSerializationOptions options) {
            var dateTimeOffset = (DateTimeOffset)value;
            var representationSerializationOptions = EnsureSerializationOptions<RepresentationSerializationOptions>(options);

            switch (representationSerializationOptions.Representation) {
            case BsonType.Array:
                bsonWriter.WriteStartArray();
                bsonWriter.WriteInt64(dateTimeOffset.UtcTicks);
                bsonWriter.WriteInt32((int)dateTimeOffset.Offset.TotalMinutes);
                bsonWriter.WriteEndArray();
                break;
            case BsonType.Document:
                bsonWriter.WriteStartDocument();
                bsonWriter.WriteDateTime("DateTime", BsonUtils.ToMillisecondsSinceEpoch(dateTimeOffset.UtcDateTime));
                bsonWriter.WriteInt64("Ticks", dateTimeOffset.UtcTicks);
                bsonWriter.WriteInt32("Offset", (int)dateTimeOffset.Offset.TotalMinutes);
                bsonWriter.WriteEndDocument();
                break;
            default:
                var message = string.Format("'{0}' is not a valid DateTimeOffset representation.", representationSerializationOptions.Representation);
                throw new BsonSerializationException(message);
            }
        }