FhirJsonSerializer to output round decimal values without decimals (ie. "4.0" => "4")

[LeoWirz]

It is related to this issue. The goal was to be able to output round decimal value as integer for "Quantity" (ie. "400.0" should be presented as "400").

The solution of implementing a custom "BsonDecimalSerializer " works to format the decimal value as an integer when we get it from the Mongo DB.

While it works as intended when we get the final output as an XML, we still have an issue when we want to get the result as a JSON because the "FhirJsonSerializer" that is used to produce it adds the ".0" again.

XML output

JSON output

A solution would be to add a custom JSON converter for decimal values (like this), but I couldn't find a way of adding a custom converter to the FhirJsonSerializer.

Is there a way to adapt the FhirJsonSerializer to handle this scenario ?