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 /echo/collections HTTP/1.1
Host: test.servicestack.net
Accept: application/xml
Content-Type: application/xml
Content-Length: length
<EchoCollections xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/Test.ServiceInterface">
<IntStringMap xmlns:d2p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays">
<d2p1:KeyValueOfintstring>
<d2p1:Key>0</d2p1:Key>
<d2p1:Value>String</d2p1:Value>
</d2p1:KeyValueOfintstring>
</IntStringMap>
<StringArray xmlns:d2p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays">
<d2p1:string>String</d2p1:string>
</StringArray>
<StringList xmlns:d2p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays">
<d2p1:string>String</d2p1:string>
</StringList>
<StringMap xmlns:d2p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays">
<d2p1:KeyValueOfstringstring>
<d2p1:Key>String</d2p1:Key>
<d2p1:Value>String</d2p1:Value>
</d2p1:KeyValueOfstringstring>
</StringMap>
</EchoCollections>
HTTP/1.1 200 OK
Content-Type: application/xml
Content-Length: length
<EchoCollections xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.datacontract.org/2004/07/Test.ServiceInterface">
<IntStringMap xmlns:d2p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays">
<d2p1:KeyValueOfintstring>
<d2p1:Key>0</d2p1:Key>
<d2p1:Value>String</d2p1:Value>
</d2p1:KeyValueOfintstring>
</IntStringMap>
<StringArray xmlns:d2p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays">
<d2p1:string>String</d2p1:string>
</StringArray>
<StringList xmlns:d2p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays">
<d2p1:string>String</d2p1:string>
</StringList>
<StringMap xmlns:d2p1="http://schemas.microsoft.com/2003/10/Serialization/Arrays">
<d2p1:KeyValueOfstringstring>
<d2p1:Key>String</d2p1:Key>
<d2p1:Value>String</d2p1:Value>
</d2p1:KeyValueOfstringstring>
</StringMap>
</EchoCollections>