Xml-Rpc.Net Server Method Missing Params with Optional Parameters

Question

Is it possible with CookComputing's XmlRpc.Net to configure a server to ignore the missing <params /> element when the server method has a params object[] args parameter?

I have a server method with something like the following signature:

[XmlRpcMethod("add_numbers")]
int AddAllTheNumbers(params object[] args);

And this works perfectly when testing with some clients. The problem is, there are a couple of clients who, when they have no parameters to send, don't output the empty <params /> or <params></params> tag.

So the client is sending something like:

<methodCall>
    <methodName>add_numbers</methodName>
</methodCall>

With no params elements. Any ideas on how to allow this request through with CookComputing's XmlRpc.Net library?