Resolved Nullreferenceexeption public class X { List<Y> name = new List<Y>(); }

Hey there,

My code is not giving any compile errors but I can't wrap my head around a nullreferenceexception I am getting when trying to .Add (from another class with a parameter that i confirmed not to be null) to the List<Dynasty> dynasties in this class:

Code (CSharp):

1. [System.Serializable]
2. public class CrimeFamily
3. {
4.  
5.     public List<Dynasty> dynasties = new List<Dynasty>();
6.  
7.     public CrimeFamily()
8.     {
9.  
10.     }
11. }

I am declaring List of class Dynasty inside of the class CrimeFamily.
but when I use families.dynasties.Add (some Dynasty class that isnt null) in another class it throws a null reference exception.

even when I add in a method like this:

Code (CSharp):

1. public void AddDynasty(Dynasty dynasty)
2.     {
3.         dynasties.Add(dynasty);
4.     }

when I call that method in another script I get:

Code (CSharp):

1. NullReferenceException: Object reference not set to an instance of an object
2. Family.AddDynasty (Dynasty dynasty) (at Assets/Scripts/Characters/Family.cs:41)

I am 100% sure it is the list<Dynasty> dynasties throwing the error, but why?

Edit: also, the Dynasty class is public
Edit2: the CrimeFamily class is created in a manager monobehaviour class where I create an array (families) of CrimeFamily through the inspector. which can then be accessed by families[0] etc etc..

 

I fixed it by adding in

Code (CSharp):

1. foreach (CrimeFamily family in families){
2.      family.dynasties = new List<Dynasty>();
3. }

In the same manager class where the Family classes are created through the inspector.