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ServicedComponent Class
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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
/** @attribute SerializableAttribute() */ 
public abstract class ServicedComponent extends ContextBoundObject implements IRemoteDispatch, IDisposable, 
public abstract class ServicedComponent extends ContextBoundObject implements IRemoteDispatch, IDisposable, 

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 http://support.microsoft.com/default.aspx?scid=kb;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)

import System.*;
import System.EnterpriseServices.*;

/** @assembly ApplicationName("Calculator")
/** @assembly ApplicationActivation(ActivationOption.Library)
/** @assembly System.Reflection.AssemblyKeyFile("Calculator.snk")
public class Calculator extends ServicedComponent
    public int Add(int x, int y)
        return x + y;
    } //Add
} //Calculator

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

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

Windows 98, Windows 2000 SP4, 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.

.NET Framework

Supported in: 2.0, 1.1, 1.0

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