Interface does not recognize class type even with declared DLL

Question

I created a Class Library project and in it a POCO class. I created an Interface (all following John Sharp’s book). Then I created my WS with WCF. Well, in the interface I declared a method of my class type created in Class Library and the interface did not recognize. I added the DLL to the project reference and I still can’t include it in the project. What should I do?

I am trying in several ways and without success. I have removed and added the DLL, restarted the machine and yet, nothing. Class is mapped with Datacontract. The code is like this:

using System.Data.Linq.Mapping;
using System.ServiceModel;
using System.Runtime.Serialization;

namespace SuporteTecnicoContracts
{ 
    [Table(Name="T_PDV")]
    [DataContract]
    public class TPDV
    {
        [Column]
        [DataMember]
        public int IDPdv { get; set; }
        [Column]
        [DataMember]
        public string CNPJ { get; set; }
        [Column]
        [DataMember]
        public string RazaoSocial { get; set; }
.......

My Interface

using System.ServiceModel.Web;
using SuporteTecnicoContracts;

namespace SuporteTecnico.Interface
{
    [ServiceContract]
    public interface ISuporteTecnicoContract
    {
        [OperationContract]
        [WebGet(UriTemplate = "/")]
        TPDV getCnpjParceiro(string _cnpj); ==> Não reconhece TPDV
    }
}

Answer 1

The following. I was with a svc within my main project. I created a new WCF Service Application project separately. I created and he created a project separately, getting my Solution with 5 projects. Thus solved the problem of recognizing the type mentioned above. This problem solved. I just don’t understand why you didn’t recognize when svc was in the same project.