To override the Content-type in your clients, use the HTTP Accept Header, append  the .xml suffix or  ?format=xml
        
        HTTP + XML
         The following are sample HTTP requests and responses. 
            The placeholders shown need to be replaced with actual values.
POST /trials/company/ HTTP/1.1 
Host: api.bookmore.com 
Accept: application/xml
Content-Type: application/xml
Content-Length: length
<AddCompanyTrial xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/BokaMera.API.ServiceModel.Dtos">
  <CompanyId>00000000-0000-0000-0000-000000000000</CompanyId>
  <TrialTypeId>0</TrialTypeId>
</AddCompanyTrial>
 
HTTP/1.1 200 OK
Content-Type: application/xml
Content-Length: length
<CompanyTrialQueryResponse xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/BokaMera.API.ServiceModel.Dtos">
  <Active>false</Active>
  <Created>0001-01-01T00:00:00</Created>
  <Started>0001-01-01T00:00:00</Started>
  <TrialType>
    <Id>0</Id>
    <Name>String</Name>
    <TrialDays>0</TrialDays>
  </TrialType>
  <TrialTypeId>0</TrialTypeId>
  <ValidTo>0001-01-01T00:00:00</ValidTo>
</CompanyTrialQueryResponse>