see C# 2D Generic List in inspector

Thank you for the tips but unfortunately it didn't work. It seems that your solution isn't using a multidimensionnal List like I do for holding the 10 initialized List in it.

$$anonymous$$aybe you made a type error in your provided code, Or (another highly probable possibility) I'm really a beginner and wasn't able to implement it right ;)

With my script added to it what is your code now?

In fact I didn't understood the concept behind that class List. When do I have to use the "innerList" ? During initialization in the for loop ?

I tried this (I commented stuff that we don't need yet):

 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 using System.Runtime.Serialization.Formatters.Binary;
 using System.IO;
 using System.Linq;
 
 public class PlayerData : $$anonymous$$onoBehaviour {
     
     int activeTree;
 //    Talent$$anonymous$$anager manager;
     TalentDatabase database;
     
 
     public List<List<ListableClass>> containerList = new List<List<ListableClass>>();
 
     [System.Serializable]
     public class ListableClass
     {
         public List<SaveTalentClass> innerList = new List<SaveTalentClass>();
     }
 
     void Start ()
     {
 //        manager = GameObject.Find ("Talent$$anonymous$$anager").GetComponent<Talent$$anonymous$$anager>();
         database = GameObject.Find ("TalentDatabase").GetComponent<TalentDatabase>();
         
 /*        if(File.Exists(Application.persistentDataPath + "/talentList.dat"))
         {
             var b = new BinaryFormatter();
             var f = File.Open(Application.persistentDataPath + "/talentList.dat", File$$anonymous$$ode.Open);
             containerList = (List<ListableClass>)b.Deserialize(f);
             f.Close();
         }
         else
         {
         */    for(int i = 0; i < 10; i++)
             {
                 containerList.Add (new List<ListableClass>());
                 for(int j = 0; j < 45; j++)
                 {
                     containerList[i].Add (new SaveTalentClass(j,0,database.talents[j].tal$$anonymous$$axRank));
                 }
             }
     //        SaveLists();
         //}
     }
     
 /*    public void SaveLists ()
     {
         var b = new BinaryFormatter();
         var f = File.Create(Application.persistentDataPath + "/talentList.dat");
         b.Serialize(f, containerList);
         f.Close();
     }
     
     public void ResetLists ()
     {
         GameObject.Find ("TalentsPanel").Broadcast$$anonymous$$essage("ResetRank");
     }
     
     void Update ()
     {
         activeTree = manager.activeTree;
         if(Input.Get$$anonymous$$eyUp("space"))
         {
             Test();
         }
     }
     
     void Test()
     {
         print (containerList[activeTree][0].talCurRank);
     }*/
 }

But as expected, it didn't work, errors are :

 error CS1502: The best overloaded method match for `System.Collections.Generic.List.Add(PlayerData.ListableClass)' has some invalid arguments
 
 error CS1503: Argument `#1' cannot convert `SaveTalentClass' expression to type `PlayerData.ListableClass'

So the listable class must go outside of the public class PlayerData like this.

 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 // and so on
 
 public class PlayerData : $$anonymous$$onoBehaviour { // opening bracket for class
 
    int activeTree;
    // and so on
 
    // a list of the listableclass 
    public List<ListableClass> containerList = new List<ListableClass>();
 
    void Update() { // a function 
    
    }
 } //a closing bracket for the class
 
 // a new class
 [System.Serializable]
 public class ListableClass { //a class with a list in it
    public List<SaveTalentClass> innerList = new List<SaveTalentClass>();
 }

the listableclass has a list in it so if you make a list of listableclass's (like the one above) then you have a list of lists that will show up in the unity editor. So that should work now :)

Thank you for helping me but it still doesn't work. Am I suppose to run the for loop to create the 10 Lists into the InnerList in a Start function inside the ListableClass ?

That really puzzle me... Once again, thank you for helping me and sorry for my lack of knowledges :(