What is the best way to deploy a new version of a .NET component and to allow easy rollback to a prior version?
The .NET DLL is being used by a VB6 app. What would be the best way to quickly revert to the prior version of the DLL if a problem occurred with the new DLL?
You'll need more details to make this work, but you might consider writing a wrapper that the VB6 code calls directly.
In the wrapper, you can use a combination of configuration files and AppDomains to load whatever .NET assmeblies you wish using whatever rules you wish. (You could load and unload assemblies on the fly, for instance.)