Introducing WF4.0: Building Distributed Apps with WF 4.0 and WF 4.0 Services

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.Runtime.Serialization;

namespace CarRentalService
{
    [DataContract]
    public class CarRentalDataContract
    {
        [DataMember]
        public string CarId { get; set; }
        [DataMember]
        public string CustomerId { get; set; }
    }
}