What's the equivalent of EJB's in Windows (.NET)

When I was first introduced to ASP.NET, I wondered if there was an equivalent to EJB's in .NET.
Well, the answer is YES...
COM+ offer all the same services that a EJB container does. So instead of beans, U write "serviced components".

COM+ services are available on the MTS (Microsoft Transaction Server) plaform and offer the following services:

• Transaction Management
• Object Pooling
• On-Demand (JIT) Object Activation
• Security Management etc.