The IXmlSerializable type 'System.Xml.Linq.XElement' cannot

Question

I have used external web service in which one of the operation methods contains XElement as a parameter.I am getting an exception which is shown below.

 

The IXmlSerializable type 'System.Xml.Linq.XElement' cannot be deserialized in partial trust because it does not have a public parameterless constructor

 

I have tried XmlElement instead of XElement but this service method return XElement

 

Thanks in advance