// Get and display the full name of the EXE assembly.
    string exeAssembly = Assembly.GetEntryAssembly().FullName;
    Console.WriteLine(exeAssembly);

    // Construct and initialize settings for a second AppDomain.
    AppDomainSetup ads = new AppDomainSetup();
    ads.ApplicationBase = AppDomain.CurrentDomain.BaseDirectory;

    ads.DisallowBindingRedirects = false;
    ads.DisallowCodeDownload = true;
    ads.ConfigurationFile =
        AppDomain.CurrentDomain.SetupInformation.ConfigurationFile;

    // Create the second AppDomain.
    AppDomain ad2 = AppDomain.CreateDomain("AD #2", null, ads);

    // Create an instance of MarshalbyRefType in the second AppDomain.
    // A proxy to the object is returned.
    MarshalByRefType mbrt =
        (MarshalByRefType) ad2.CreateInstanceAndUnwrap(
            exeAssembly,
            typeof(MarshalByRefType).FullName
        );

    // Call a method on the object via the proxy, passing the
    // default AppDomain's friendly name in as a parameter.
    mbrt.SomeMethod(callingDomainName);

    // Unload the second AppDomain. This deletes its object and
    // invalidates the proxy object.
    AppDomain.Unload(ad2);
    try
    {
        // Call the method again. Note that this time it fails
        // because the second AppDomain was unloaded.
        mbrt.SomeMethod(callingDomainName);
        Console.WriteLine("Sucessful call.");
    }
    catch(AppDomainUnloadedException)
    {
        Console.WriteLine("Failed call; this is expected.");
    }
}

    // Display the name of the calling AppDomain and the name
    // of the second domain.
    // NOTE: The application's thread has transitioned between
    // AppDomains.
    Console.WriteLine("Calling from '{0}' to '{1}'.",
        callingDomainName,
        Thread.GetDomain().FriendlyName
    );
}