It is not necessary to add a reference to a .dll file if the file is stored in the same project subdirectory.

Question

Quizplus · Accepted Answer

Even if a .dll file is stored in the same project subdirectory, you still need to add a reference to it in your project to properly use the functionalities provided by the .dll. This is because the .NET runtime needs to know about the assembly and its types to use them, regardless of the physical location of the .dll file.

It Is Not Necessary to Add a Reference to a .Dll