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.

Note:
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)
    {
        return(x+y);
    }
}

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

};

[assembly: ApplicationName(S"Calculator")]
[assembly: ApplicationActivation(ActivationOption::Library)]
[assembly: System::Reflection::AssemblyKeyFile(S"Calculator.snk")];

public __gc class Calculator : public ServicedComponent {
public:
  int Add (int x, int y) {
    return(x+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

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

.NET Framework

Reference