I want to install 3 dll's for my work project, but i don't know if the dll's will work in Visual Studio 2019

Question

The dll's are:

-CrystalDecisions.Enterprise.Framework

-CrystalDecisions.Enterprise.InfoStore

-Microsoft.VisualStudio.TeamSystem.Data.UnitTesting

I'm trying to update an old project to the new c# updates.

Answer 1

It is the.Net version that must be compatible with any loaded dlls, and newer visual studio versions do support older.Net versions. If you are updating from.Net framework to.Net core/5/6 you might just have to test it.

.Net core/5/6 is not backwards compatible with.Net framework, since some functionality have been removed. I think you can still try to load a dll written for.Net framework, but if any removed functionality is called you will get a runtime failure. So you need to be diligent with testing.

I would expect libraries that does things like UI and communication to work less well, and libraries that mostly do things like computation, or wraps native functionality, to work better.