Assembly: mscorlib (in mscorlib.dll)
'Declaration <SerializableAttribute> _ <ComVisibleAttribute(True)> _ Public MustInherit Class MarshalByRefObject 'Usage Dim instance As MarshalByRefObject
/** @attribute SerializableAttribute() */ /** @attribute ComVisibleAttribute(true) */ public abstract class MarshalByRefObject
An application domain is a partition in an operating system process where one or more applications reside. Objects in the same application domain communicate directly. Objects in different application domains communicate either by transporting copies of objects across application domain boundaries, or by using a proxy to exchange messages.
MarshalByRefObject is the base class for objects that communicate across application domain boundaries by exchanging messages using a proxy. Objects that do not inherit from MarshalByRefObject are implicitly marshal by value. When a remote application references a marshal by value object, a copy of the object is passed across application domain boundaries.
MarshalByRefObject objects are accessed directly within the boundaries of the local application domain. The first time an application in a remote application domain accesses a MarshalByRefObject, a proxy is passed to the remote application. Subsequent calls on the proxy are marshaled back to the object residing in the local application domain.
Types must inherit from MarshalByRefObject when the type is used across application domain boundaries, and the state of the object must not be copied because the members of the object are not usable outside the application domain where they were created.
The following sample demonstrates a class derived from MarshalByRefObject that is used later in remoting.
Imports System Imports System.Runtime.Remoting Imports System.Security.Permissions Public Class SetObjectUriForMarshalTest Class TestClass Inherits MarshalByRefObject End Class <SecurityPermission(SecurityAction.LinkDemand)> _ Public Shared Sub Main() Dim obj As TestClass = New TestClass() RemotingServices.SetObjectUriForMarshal(obj, "testUri") RemotingServices.Marshal(obj) Console.WriteLine(RemotingServices.GetObjectUri(obj)) End Sub End Class
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.