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ServicedComponent Class

Represents the base class of all classes using COM+ services.

Namespace:  System.EnterpriseServices
Assembly:  System.EnterpriseServices (in System.EnterpriseServices.dll)

public abstract class ServicedComponent : ContextBoundObject, 
	IRemoteDispatch, IDisposable, IServicedComponentInfo

The ServicedComponent type exposes the following members.

Public methodServicedComponentInitializes a new instance of the ServicedComponent class.

Protected methodActivateCalled by the infrastructure when the object is created or allocated from a pool. Override this method to add custom initialization code to objects.
Protected methodCanBePooledThis method is called by the infrastructure before the object is put back into the pool. Override this method to vote on whether the object is put back into the pool.
Protected methodConstructCalled by the infrastructure just after the constructor is called, passing in the constructor string. Override this method to make use of the construction string value.
Public methodCreateObjRefCreates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object. (Inherited from MarshalByRefObject.)
Protected methodDeactivateCalled by the infrastructure when the object is about to be deactivated. Override this method to add custom finalization code to objects when just-in-time (JIT) compiled code or object pooling is used.
Public methodDispose()Releases all resources used by the ServicedComponent.
Protected methodDispose(Boolean)Releases the unmanaged resources used by the ServicedComponent and optionally releases the managed resources.
Public methodStatic memberDisposeObjectFinalizes the object and removes the associated COM+ reference.
Public methodEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodGetLifetimeServiceRetrieves the current lifetime service object that controls the lifetime policy for this instance. (Inherited from MarshalByRefObject.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodInitializeLifetimeServiceObtains a lifetime service object to control the lifetime policy for this instance. (Inherited from MarshalByRefObject.)
Protected methodMemberwiseClone()Creates a shallow copy of the current Object. (Inherited from Object.)
Protected methodMemberwiseClone(Boolean)Creates a shallow copy of the current MarshalByRefObject object. (Inherited from MarshalByRefObject.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)

Explicit interface implemetationPrivate methodIRemoteDispatch.RemoteDispatchAutoDoneEnsures that, in the COM+ context, the ServicedComponent class object's done bit is set to true after a remote method invocation
Explicit interface implemetationPrivate methodIRemoteDispatch.RemoteDispatchNotAutoDoneDoes not ensure that, in the COM+ context, the ServicedComponent class object's done bit is set to true after a remote method invocation.
Explicit interface implemetationPrivate methodIServicedComponentInfo.GetComponentInfoObtains information about the ServicedComponent class instance.

Under certain conditions, a class that is derived from ServicedComponent that runs in a COM+ application may stop responding. This problem is caused by an Activity deadlock. Activities can deadlock on multithreaded applications because of an asynchronous cleanup of component references. To work around this problem, call the Dispose method when you complete work with objects derived from ServicedComponent. For more information, see;en-us;327443.


Client code must call Dispose on serviced components to ensure proper operation.

The following code example demonstrates how to expose a class as a configured COM component.

using System;
using System.EnterpriseServices;

[assembly: ApplicationName("Calculator")]
[assembly: ApplicationActivation(ActivationOption.Library)]
[assembly: System.Reflection.AssemblyKeyFile("Calculator.snk")]
public class Calculator : ServicedComponent
    public int Add (int x, int y)

To deploy this class as a configured COM component, you must generate a strong key, compile the class as a library, and register the library. These three steps are accomplished by the following three commands.

 sn -k Calculator.snk
 csc /t:library Calculator.cs
 regsvcs Calculator.dll

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.