.NET: How does the use of components in .NET differ to pre-.NET?

How does the use of components in .NET differ to pre-.NET?

Are the differences as follows?

• .NET components don't have to be centrally registered on a machine and can merely be invoked at run-time from a specified location
• if .NET components are 'registered' in the GAC, 开发者_Python百科problems associated with different versions of the same DLL ("DLL hell") are avoided because each version will have its own id/key which is known to the calling program

Is the above correct?

What other relevant differences are there?

In the era of COM, one could host the DLL as a DCOM service and could invoke the service hosted in one m/c from another. After web services gained popularity, DCOM has become obsolete.

The differences given in the question are the most relevant. Other differences relate only to ease of use with IDEs.