How to convert the WCF service data in to Data table

I have a WCF Service in my project which returns "ID and Name" in List<>. I need to access this within same project and convert the return values into DataTable and bind it into Dropdown list. How to use it using Newtonsoft.Json.

My WCF Service is:
 [OperationContract]         [WebInvoke(Method = "GET",             ResponseFormat = WebMessageFormat.Json,             BodyStyle = WebMessageBodyStyle.Wrapped,             UriTemplate = "getname/{formid}")]         List<GetNameInfo> getname(string formid)
.cs file is
 public List<GetNameInfo> getname(string formid)         {   &n ...