How to use a class define in library without referencing the package? In C# using visual studio.

Question

I have a program that use a method on a class. That class is in a library that uses a reference to a package. That method returns a class defined in that package.
Visual studio tells me I must reference that package to use that class in my program. Is there a way to use that class without referencing the package in my program?

Answer 1

I expressed myself badly. I talked about a nuget package I imported.

Answer 2

I have a program for the GUI and it uses a library. This library has a reference to a nuget package. Winscp to be precise. There is a method to get a listing of directories in a ftp directory. That method returns a collection of objects. Those are defined in the Winscp library. So when I want to use the return of the method in my GUI program, it doesn't know the definition of these objects.
But if I reference the Winscp library in my GUI program, I wouldn't need to use a library.

But I resolved my problem by making a new class in my library and I copied the collection in a list of my class. It was not very long.