关于AppDomain 创建实例进行程序集之间的通讯问题

        各位高手们,我在用AppDomain 的CreateInstanceFromAndUnwrap 创建一个实例进行程序之间的通讯时,会抛异常,提示"Constructor on type 'DllResource.DeriveClass' not found.",代码如下:

private BaseClass GetTrigger(string FileName)//返回指定文件的TriggerDesignerFacade
        {
            try
            {
                AppDomainSetup info = new AppDomainSetup();

                info.ApplicationName = "Load";

                AllTriggersDomain = AppDomain.CreateDomain(FileName, null, info);

                Domains.Add(FileName, AllTriggersDomain);

                object[] parms = { FileName };

                BindingFlags bindings = BindingFlags.CreateInstance | BindingFlags.Instance | BindingFlags.Public;

                //创建实践实现程序集之间的通讯
                var Trigger = (BaseClass)AllTriggersDomain.CreateInstanceFromAndUnwrap(FileName,
                                                            "DllResource.DeriveClass", true, bindings, null, parms, null, null, null);

                //Assembly aDll = Trigger.GetLoadAssembly(FileName);

                //var rc = (BaseClass)aDll.CreateInstance("DllResource.DeriveClass");

                //rc.SetSettingFolder(System.IO.Path.GetDirectoryName(FileName));

                //return rc;

                return null;
            }
            catch
            {
                return null;
            }
        }

我想调用抽象类进行通讯,可是创建实例时失败,在这里BaseClass 是基类(抽象类)　DeriveClass　是继承类;

我把这行代码改成:

                var Trigger = (BaseClass)AllTriggersDomain.CreateInstanceFromAndUnwrap(FileName,
                                                            "DllResource.BaseClass", true, bindings, null, parms, null, null, null);

也是一样提示：＂Constructor on type 'DllResource.BaseClass' not found.＂　　

下面是我的继承类和基类的代码：

继承类：

namespace DllResource
{
    class DeriveClass : BaseClass
    {
        public DeriveClass ()   
        {

        }

        public override void Display()
        {
            throw new NotImplementedException();
        }
        public override int Counter(int num)
        {
            return num++;
        }
       
    }
}

基础类： 

namespace DllResource
{
    public abstract class BaseClass
    {
      
        public abstract void Display();

        public abstract int Counter(int num);
    }
}

不知道怎么解决，请各位高手指点，在线等...................