Include null in web api xmlformatter

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WebAPI

I am using xml formatter and returning xml from WEB API. Web API removed NULL columns from the output. In json formatter we can have below code to include NULL values in output.

<pre lang="c#">

GlobalConfiguration.Configuration.Formatters.JsonFormatter.SerializerSettings.NullValueHandling = NullValueHandling.Include;

But there is no equivalent properties in XmlFormatter. I've tried searching but not been able to find a solution so far.

Please help. Thanks.

What I have tried:

I tried finding similar properties for XmlFormatter as that of JsonFormatter but could not find it.