LanguageExt's Seq<T> serializer for Mongo DB

Serializer.cs

using MongoDB.Bson;
using MongoDB.Bson.Serialization;
using MongoDB.Bson.Serialization.Conventions;
using MongoDB.Bson.Serialization.Serializers;
using LanguageExt;

public class SeqSerializationProvider : IBsonSerializationProvider
{
    public IBsonSerializer? GetSerializer(Type type)
    {
        if (!type.IsGenericType || type.GetGenericTypeDefinition() != typeof(Seq<>)) return null;
        var valueType = type.GetGenericArguments()[0];
        var serializerType = typeof(SeqSerializer<>).MakeGenericType(valueType);
        return (IBsonSerializer?)Activator.CreateInstance(serializerType);
    }
}

public class SeqSerializer<T> : SerializerBase<Seq<T>>
{
    readonly ArraySerializer<T> serializer = new();
    
    public override void Serialize(BsonSerializationContext context, BsonSerializationArgs args, Seq<T> value)
    {
        serializer.Serialize(context, args, value.ToArray());
    }

    public override Seq<T> Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args) => 
        serializer.Deserialize(context, args).ToSeq();
}