using System;

using System.Linq;

using System.Collections.Generic;

using Microsoft.Practices.Unity;

using Microsoft.Practices.Unity.InterceptionExtension;

​

public class Program

{

    public static void Main()

    {

        var container = new UnityContainer()

            .AddNewExtension<Interception>()            

            .RegisterType<IService,Service>(

                    new Interceptor<InterfaceInterceptor>(),

                    new InterceptionBehavior<ServiceInterceptor>())

            .RegisterType<ITracer, ConsoleTracer>()

            .RegisterType<ServiceInterceptor>(

                    new InjectionConstructor(

                        new ResolvedParameter<ITracer>(),

                        "Hello World"));

        var service = container.Resolve<IService>();

        service.SayHello();

    }

}

​

public interface IService 

{

    void SayHello();

}

public class Service: IService 

{

    public void SayHello()

    {

        Console.WriteLine("Hello from Service");

    }

}

​

public interface ITracer

{

    void Trace(string message);

}

public class ConsoleTracer: ITracer

{

    public void Trace(string message)

    {

        Console.WriteLine(message);

    }

}

​

public class ServiceInterceptor : IInterceptionBehavior

{

    private readonly string _message;

    private readonly ITracer _tracer;

    public ServiceInterceptor(ITracer tracer, string message)

    {

        _tracer = tracer;

        _message = message;

    }

    public IMethodReturn Invoke(IMethodInvocation input, GetNextInterceptionBehaviorDelegate getNext)

    {

        _tracer.Trace(String.Format(

            "Invoking method {0} at {1}. {2}",

            input.MethodBase, DateTime.Now.ToLongTimeString(), _message));

​

​

        var result = getNext()(input, getNext);

        return result;

    }

​

    public IEnumerable<Type> GetRequiredInterfaces()

    {

        return Type.EmptyTypes;

    }

​

    public bool WillExecute

    {

        get { return true; }

    }

}