Question

I have a ServiceContract on the server like this:

[ServiceContract]
public interface ICheckService
{
    [OperationContract]
    IEnumerable<Message> CheckInbox(string user);
}

I copied above definition into the proxy class on the client:

[ServiceContract]
public interface ICheckService
{
    [OperationContract]
    IEnumerable<Message> CheckInbox(string user);
}

When I am compiling the client, I get the following error:

The type or namespace name 'Message' could not be found (are you missing a using directive or an assembly reference?) (CS0246)

Message.cs

public class Message
{
    public int message_id;
    public string message_from;
    public string message_to;
    public string message_text;
    public DateTime message_time;
}

Is this where DataContracts come into play? If so, What should I modify in the ServiceContract definition?

Note: The ServiceContract has other OperationContracts which return simple data types and are working.

Answer 1

[DataContract]
public class Message{
[DataMember]
public String Sender{get;set;}
//etc - not sure what your message class contains
}

Something like that 🙂