Create WCF Restful service returning multiple response object

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C#

Hi ,

I have to create WCF Restful service in .net with c# , i aware about attribute which need to define WCF Restful service , But my query is how to send response from different classes in one response object and response object should be in Json.

Like i have class User having fields id, username and List<role>

public class User
{
public int id { get; set; }
public String username { get; set; }
public List<role> roles { get; set; }
}

So i want to know how to add List of Role response in the same response object of id and username.

Again Role class has another list of operation

public class Role
{
public String username { get; set; }
public List<operation> operations { get; set; }
}


So i want to know how to add list of Operation and Role to the same response of id and username