?using System;  
using System.Collections.Generic;  
using System.Text;  
using System.Runtime.Remoting;  
using System.Reflection;  
using Artech.AppDomainIsolation;  
  
namespace Artech.AppDomainIsolation  
{  
    public class GeneralType  
    {  
        AppDomain GetAppDomain()  
        {  
            return AppDomain.CurrentDomain;  
        }  
    }  
  
    [Serializable]  
    public class MarshalByValueType  
    {  
        public AppDomain GetAppDomain()  
        {  
            return AppDomain.CurrentDomain;  
        }  
    }  
  
    public class MarshalByRefType : MarshalByRefObject  
    {  
        public AppDomain GetAppDomain()  
        {  
            return AppDomain.CurrentDomain;  
        }  
    }  
     class Program  
    {  
           
        static void Main(string[] args)  
        {  
            AppDomain appDomain = AppDomain.CreateDomain("newAppDomain");  
  
            string assemblyName = "Artech.AppDomainIsolation";  
            try  
            {  
 GeneralType generalObject =  (GeneralType)appDomain.CreateInstanceAndUnwrap(assemblyName,  "Artech.AppDomainIsolation.GeneralType");  
            }  
            catch (Exception ex)  
            {  
 Console.WriteLine("Fail to pass a general type instance created  in another application domain to default appliction domain,beacuse  \"{0}\"", ex.Message); 
            }  
  
 MarshalByValueType marshalByValueObject =  (MarshalByValueType)appDomain.CreateInstanceAndUnwrap(assemblyName,  "Artech.AppDomainIsolation.MarshalByValueType");  
 MarshalByRefType marshalByRefObject =  (MarshalByRefType)appDomain.CreateInstanceAndUnwrap(assemblyName,  "Artech.AppDomainIsolation.MarshalByRefType");  
  
 Console.WriteLine("\nmarshalByValueObject is a transparent  proxy?  {0}.",RemotingServices.IsTransparentProxy(marshalByValueObject)?"Yes":"No");  
 Console.WriteLine("marshalByRefObject is a transparent proxy?  {0}.", RemotingServices.IsTransparentProxy(marshalByRefObject) ? "Yes"  : "No");  
  
            AppDomain appDomain_MarshalByValueType = marshalByValueObject.GetAppDomain();  
            AppDomain appDomain_MarshalByRefType = marshalByRefObject.GetAppDomain();  
  
            Console.WriteLine("\nThe method of marshalByValueObject is executed in the default application domain?\"{0}\"",  
                object.ReferenceEquals(AppDomain.CurrentDomain, appDomain_MarshalByValueType) ? "Yes" : "No");  
            Console.WriteLine("The method of marshalByRefObject is executed in the default application domain?\"{0}\"",  
               object.ReferenceEquals(AppDomain.CurrentDomain, appDomain_MarshalByRefType) ? "Yes" : "No");  
  
            AppDomain.Unload(appDomain_MarshalByRefType);  
            marshalByValueObject.GetAppDomain();  
  
            try  
            {  
                marshalByRefObject.GetAppDomain();  
            }  
            catch (Exception ex)  
            {  
 Console.WriteLine("\nAn exception is thorwn when calling the  method of marshalByRefObject because \"{0}\"", ex.Message);  
            }  
            Console.Read();  
        }  
    }  
}