Yan babao's point of view (1) relations among COM, COM +, and. net

Relations among COM, COM +, and. net

(Here is my personal understanding. please correct me)

Com is a component object model.
What is the role of a component? Construct an application by using componentsProgram. Therefore, the extension of COM is at the application level.

COM + is a middleware-centered application service.
What is the role of a service? Services such as messages and MTS constitute the DNA "Application Server" layer (involved in OS). Therefore, the extended operating system level of COM + is formed.

. Net is a fuzzy concept. From the perspective of the. NET object model, from encoding to assembly,. Net completely replaces COM.
If. from the perspective of the. NET Framework ,. net itself runs on the underlying COM + Service (. NET provides a set of encapsulation classes, as the existing COM + service adapter), so.. NET and COM +.