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 /api/accountingtransaction/transfer HTTP/1.1 
Host: api.pos365.vn 
Accept: application/xml
Content-Type: application/xml
Content-Length: length
<AccountingTransactionTransfer xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/POS.Services">
  <Amount>0</Amount>
  <Description>String</Description>
  <FromAccountId>0</FromAccountId>
  <ToAccountId>0</ToAccountId>
  <ToBranchId>0</ToBranchId>
</AccountingTransactionTransfer>
 
HTTP/1.1 200 OK
Content-Type: application/xml
Content-Length: length
<z:anyType xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns:z="http://schemas.microsoft.com/2003/10/Serialization/" />