I have created a WCF service with one method which returns a System.Xml.XmlElement:

using System.Xml;

...

public XmlElement Execute(...)
{
    XmlNode node = ...;

    return (XmlElement)node;
}

When I try to access the service deployed on my server

WCFServiceClient service = new WCFServiceClient("WSHttpBinding_IWCFService");
XmlElement node = service.Execute(...);

I get the error:

Cannot implicitly convert type 'System.Xml.Linq.XElement' to 'System.Xml.XmlElement'

Searching my service solution, I cannot see any reference to System.Xml.Linq.XElement. Is it wrong of me to expect a System.Xml.Xmlelement or is VS 2010 fooling around with me?

Thanks in advance.