using System;
using System.Reflection; 
using System.Runtime.Remoting;

class App
{
   static void Main()
   {
      object obj = null;
      try
      {
         obj = UseAppDomain("lib, Version=1.0.0.0, "
            + "Culture=neutral, PublicKeyToken=3bf941bb1f722efe");
         InvokeObject(obj);
      }
      catch(Exception e1)
      {
         Console.WriteLine(e1.GetType().ToString());
      }
      try
      {
         obj = UseAppDomain("lib");
         InvokeObject(obj);
      }
      catch(Exception e2)
      {
         Console.WriteLine(e2.GetType().ToString());
      }
   }
   static object UseAppDomain(string name)
   {
      AppDomain ad = AppDomain.CurrentDomain;
      return ad.CreateInstanceAndUnwrap(name, "LibraryCode");
   }
   static void InvokeObject(object obj)
   {
      Type type = obj.GetType();
      MethodInfo mi = type.GetMethod("GetVersion");
      string version = (string)mi.Invoke(obj, null);
      Console.WriteLine(version);
   }
}