using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
namespace ClientInfoSample
{
[ServiceContract]
public interface IService
{
[OperationContract]
string GetData(string value);
}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.Text;
using System.ServiceModel.Channels;
namespace ClientInfoSample
{
public class MyService : IService
{
public string GetData(string value)
{
OperationContext context = OperationContext.Current;
MessageProperties essageProperties = context.IncomingMessageProperties;
RemoteEndpointMessageProperty endpointProperty =
messageProperties  [RemoteEndpointMessageProperty.Name]
as RemoteEndpointMessageProperty;
return string.Format("Hello {0}! Your IP address is {1} and your port is {2}",  value, endpointProperty.Address, endpointProperty.Port);
}
}
}