Referenced project dependencies DLL are not being copied

Question

My project solution is currently having three projects:

1. MyProject, which is my main startup project (using .NET Framework 4.7) -

Answer 1

Solved this by adding the following line into my .csproj file:

PackageReference

Specifically to the PropertyGroup group.

Not sure why it makes such difference, if anyone could explain and post in the comment it would be great. Any additional informations I will add to this answer.