添加按钮的代码能否不放在csAddins.dll中？

    internal sealed class LubanAddin : Bentley.MicroStation.AddIn
    {
        private LubanAddin(System.IntPtr mdlDesc) : base(mdlDesc)
        {
        }
        protected override int Run(string[] commandLine)
        {
            ExecuteMethod("Initialize");
            return 0;
        }

        public void ExecuteMethod(String strMethod)
        {
            try
            {
                if (null == m_Assembly)
                {
                    string strPath = "";
                    if (CommonFunction.GetLbTransPath(ref strPath))
                        // 加载Bentley插件
                        m_Assembly = Assembly.LoadFrom(strPath + "\\" + "LBExternalApplication.dll");
                }
                if (null == m_Assembly)
                    return;
                Type[] type = m_Assembly.GetTypes();
                foreach (Type t in type)
                {
                    // 查找要调用的命名空间及类
                    if (t.Namespace == "LBFileUpdate" && t.Name == "LBAppEntry")
                    {
                        // 查找要调用的方法并进行调用
                        MethodInfo m = t.GetMethod(strMethod);
                        if (m != null)
                        {
                            object reflectTest = Activator.CreateInstance(t);
                            m.Invoke(reflectTest, new object[] { });
                            break;
                        }
                    }
                }

            }
            catch (System.Exception ex)
            {

            }
        }
        // 当前程序集变量
        private Assembly m_Assembly = null;
    }

能否将添加按钮的代码放在另一个dll中，不放在LubanAddin.dll里？