public class UtcDateTimeOffsetSerializer : StructSerializerBase<DateTimeOffset>
{
    // public methods
    /// <summary>
    /// Deserializes a value.
    /// </summary>
    /// <param name="context">The deserialization context.</param>
    /// <param name="args">The deserialization args.</param>
    /// <returns>A deserialized value.</returns>
    public override DateTimeOffset Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args)
    {
        var bsonReader = context.Reader;
        var bsonType = bsonReader.GetCurrentBsonType();
        
        if (bsonType != BsonType.Array)
            throw CreateCannotDeserializeFromBsonTypeException(bsonType);

        bsonReader.ReadStartArray();
        var ticks = bsonReader.ReadInt64();
        var offset = TimeSpan.FromMinutes(bsonReader.ReadInt32());
        bsonReader.ReadEndArray();
        return new DateTimeOffset(ticks + offset.Ticks, offset);
    }

    /// <summary>
    /// Serializes a value.
    /// </summary>
    /// <param name="context">The serialization context.</param>
    /// <param name="args">The serialization args.</param>
    /// <param name="value">The object.</param>
    public override void Serialize(BsonSerializationContext context, BsonSerializationArgs args, DateTimeOffset value)
    {
        var bsonWriter = context.Writer;
        bsonWriter.WriteStartArray();
        bsonWriter.WriteInt64(value.UtcTicks);
        bsonWriter.WriteInt32((int) value.Offset.TotalMinutes);
        bsonWriter.WriteEndArray();
    }
}