using System;
using System.Reflection;
using System.Threading;
class Module1
{
public static void Main()
{
// Get and display the friendly name of the default AppDomain.
string callingDomainName = Thread.GetDomain().FriendlyName;
Console.WriteLine(callingDomainName);
// 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 =
"file:///" + System.Environment.CurrentDirectory;
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.");
}
}
}
// Because this class is derived from MarshalByRefObject, a proxy
// to a MarshalByRefType object can be returned across an AppDomain
// boundary.
public class MarshalByRefType : MarshalByRefObject
{
// Call this method via a proxy.
public void SomeMethod(string callingDomainName)
{
// Get this AppDomain's settings and display some of them.
AppDomainSetup ads = AppDomain.CurrentDomain.SetupInformation;
Console.WriteLine("AppName={0}, AppBase={1}, ConfigFile={2}",
ads.ApplicationName,
ads.ApplicationBase,
ads.ConfigurationFile
);
// 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
);
}
}
/* This code produces output similar to the following:
AppDomainX.exe
AppDomainX, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
AppName=, AppBase=C:\AppDomain\bin, ConfigFile=C:\AppDomain\bin\AppDomainX.exe.config
Calling from 'AppDomainX.exe' to 'AD #2'.
Failed call; this is expected.
*/