Aspect Oriented Programming with MEF using the interceptors. Compose an interceptor catalog in the example below

gistfile1.cs

        private static void Compose()
        {
            var catalog = new AggregateCatalog();
            catalog.Catalogs.Add(new DirectoryCatalog(@".\bin"));

            var cfg = new InterceptionConfiguration()
            .AddInterceptor(new DynamicProxyInterceptor(new LogInterceptor()));
            var interceptingCatalog = new InterceptingCatalog(catalog, cfg);
            Container = new CompositionContainer(interceptingCatalog);
        }

LogInterceptor.cs

    public class LogInterceptor : IInterceptor
    {
        public void Intercept(IInvocation invocation)
        {
            if(invocation.TargetType.GetCustomAttributes(typeof(LogMethodCallsAttribute), true).Length > 0)
            {
                var loggerFacade = MefInstanceProvider.Container.GetExportedValue<ILoggerFacade>();
                loggerFacade.Log(FormatMethodCall(invocation, ApplicationStates.Started), Category.Info, Priority.Low);

                invocation.Proceed();

                loggerFacade.Log(FormatMethodCall(invocation, ApplicationStates.Ended), Category.Info, Priority.Low);

                return;
            }

            invocation.Proceed();
        }

        private static string FormatMethodCall(IInvocation invocation, ApplicationStates state)
        {
            var message = invocation.InvocationTarget.GetType().Name + " Call " + state + ": ";

            var result = invocation.Method.Name;
            result += "(";

            foreach(var parameter in invocation.Method.GetParameters())
            {
                result += parameter.ParameterType.Name + " " + parameter.Name + ", ";
            }

            result = result.Remove(result.Length - 2);
            result += ")";

            return message + result;
        }
    }

LogMethodCallsAttribute.cs

    /// <summary>
    /// Used by the MEF Interceptors
    /// </summary>
    public class LogMethodCallsAttribute : Attribute {}