Getting Around InvokeRequired Without Copy and Paste

using System;
using System.Collections;
using System.ComponentModel;
using System.Diagnostics;
using System.Reflection;
using System.Text;
using Castle.Core.Interceptor;
using Osherove.SimpleInterception;

namespace Osherove.SimpleInterception
{
    internal class MethodInterceptor : IInterceptor
    {
        private static Hashtable cache = new Hashtable();
        public void Intercept(IInvocation invocation)
        {
            if(invocation.Method.Name=="WndProcMessage")
            {
                invocation.Proceed();
                return;
            }

            AOPAttributeBase[] aops;
            string key = string.Format("{0}.{1}{2}", invocation.TargetType.FullName,invocation.Method.Name, GetArgumentNames(invocation));
            if (cache.ContainsKey(key))
            {
                aops = (AOPAttributeBase[]) cache[key];
            }
            else
            {
                aops = (AOPAttributeBase[]) invocation.Method.GetCustomAttributes(typeof (AOPAttributeBase), true);
                cache[key] = aops;
            }
            AOPInvocation invocationWrapper = new AOPInvocation(invocation);

            if (aops!=null)
            {
                foreach (AOPAttributeBase aop in aops)
                {
                    aop.OnInvoke(invocationWrapper);
                }
            }
            else
            {
                Console.WriteLine("no AOPs found");
            }
            if(!invocationWrapper.HasProceeded)
            {
                invocationWrapper.Proceed();
            }
        }


        private static string  GetArgumentNames(IInvocation invocation)
        {
            StringBuilder sb = new StringBuilder(50);
            foreach (object argument in invocation.Arguments)
            {
                sb.Append(argument.GetType().Name);
                sb.Append("|");
            }

            if (invocation.GenericArguments!=null)
            {
                foreach (Type argument in invocation.GenericArguments)
                {
                    sb.Append(argument.Name);
                    sb.Append("*");
                }
            }
            return sb.ToString();
        }
    }
}