public interface IUserProcessor

    {

        void RegUser(User user);

    }

    public class UserProcessor : IUserProcessor

    {

        public virtual void RegUser(User user)

        {

            Console.WriteLine("用户已注册。Name:{0},PassWord:{1}", user.Name, user.PassWord);

        }

    }  

 public class MyInterceptor : IInterceptor

    {

        public void Intercept(IInvocation invocation)

        {

            PreProceed(invocation);

            invocation.Proceed();

            PostProceed(invocation);

        }

        public void PreProceed(IInvocation invocation)

        {

            Console.WriteLine("方法执行前");

        }  

        public void PostProceed(IInvocation invocation)

        {

            Console.WriteLine("方法执行后");

        }

    }  

public class User

    {

        public string Name { get; set; }

        public string PassWord { get; set; }

    }

    try

            {

                ProxyGenerator generator = new ProxyGenerator();

                MyInterceptor interceptor = new MyInterceptor();

                UserProcessor userprocessor = generator.CreateClassProxy<UserProcessor>(interceptor);

                User user = new User() { Name = "lee", PassWord = "" };

                userprocessor.RegUser(user);

            }

            catch (Exception ex)

            {

                throw ex;

            }