JSON.NET(NewtonSoft.dll) changed my proxy class while updating my wcf service reference

i am working on HealthCare project. i have been given task to convert JSON format to HL7 format. to make it happen, i import Newtonsoft.dll to my project.after adding the reference to my project. while updating the wcf service reference, i found my whole proxy class get changed because of the added newtonsoft reference.i come up with more then 200 syntex issues in my wpf application.most of issues related to data type conversion. issues like: -Cannot implicitly convert type 'System.Xml.XmlElement' to 'System.Xml.Linq.XElement'
-Cannot implicitly convert type 'string[]' to 'System.Collections.Generic.List'

if i am removing the newtonsoft dll and updating the wcf service once again.everything comes perfect. please do help me out.......... thanks .net software engineer

via Chebli Mohamed