<%@ ServiceHost Language="C#" Debug="true" Service="CustomersService.Customers" CodeBehind="Customers.svc.cs" %>

using System;

using System.Collections.Generic;

using System.Linq;

namespace CustomersService

{

    public class Customers : ICustomers

    {

        // Finder

        public List<Customer> GetAllCustomers()

        {

            return new List<Customer>()

            {

                new Customer

                {

                    CustomerID = 1,

                    CustomerName = "Bob",

                },

                new Customer

                {

                    CustomerID = 2,

                    CustomerName = "Bill",

                },

                new Customer

                {

                    CustomerID = 3,

                    CustomerName = "Cheryl",

                },

            };

        }

        // Specific finder

        public Customer GetCustomerByID(int CustomerID)

        {

            return GetAllCustomers().FirstOrDefault(c => c.CustomerID == CustomerID);

        }

    }

}

using System;

using System.Collections.Generic;

using System.Linq;

using System.Runtime.Serialization;

using System.ServiceModel;

namespace CustomersService

{

    [ServiceContract]

    public interface ICustomers

    {

        [OperationContract] //finder

        List<Customer> GetAllCustomers();

        [OperationContract] //specificFinder

        Customer GetCustomerByID(int CustomerID);

    }

    [DataContract]

    public class Customer

    {

        [DataMember]

        public int CustomerID { get; set; }

        [DataMember]

        public string CustomerName { get; set; }

    }

}

<?xml version="1.0"?>

<configuration>

  <system.serviceModel>

    <services>

      <service behaviorConfiguration="CustomersService.Service1Behavior"

        name="CustomersService.Customers">

        <endpoint address="" binding="wsHttpBinding" contract="CustomersService.ICustomers">

          <identity>

            <dns value="localhost" />

          </identity>

        </endpoint>

        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />

      </service>

    </services>

    <behaviors>

      <serviceBehaviors>

        <behavior name="CustomersService.Service1Behavior">

          <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deploying the solution. -->

          <serviceMetadata httpGetEnabled="true"/>

          <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deploying the solution to avoid disclosing exception information. -->

          <serviceDebug includeExceptionDetailInFaults="false"/>

        </behavior>

      </serviceBehaviors>

    </behaviors>

  </system.serviceModel>

</configuration>