System.NullReferenceException Object reference not set to an instance of an object (List)

Question

public List<Faculty> Faculties {get;set;}   
List<Faculty> faculties = FacultiesManager.Faculties;
Faculties.Add(something);

how can i interact with the object list

Answer 1

It seems like the list is not initialised. You need to call:

Faculties = new List<Faculty>();

before you can interact with the list.

Answer 2

It should be

public List<Faculty> Faculties = new List<>

instead of

public List<Faculty> Faculties {get; set;}