Custom mongodb serializer, able to wrap/unwrap string values to/from custom class instances

MyClassSerializer.cs

class MyClassSerializer : SerializerBase<Plate> {
      public override MyClass Deserialize(BsonDeserializationContext context, BsonDeserializationArgs args) {
          string value = context.Reader.ReadString();
          return new MyClass(value);
      }

      public override void Serialize(BsonSerializationContext context, BsonSerializationArgs args, MyClass obj) {
          context.Writer.WriteString(obj.Value);
      }
  }
  
  class MyClass {
    public string Value { get; }
    
    public MyClass(string value) {
      Value = value;
    }
  }