for loop function causing game to not save

I am trying to save my game and it all works fine, until I get to using a for loop to obtain variables. It works fine without the for loop, however I need it to obtain the values to spawn the prefabs again.

 using UnityEngine;
 using System.Collections;
 using System;
 using System.Runtime.Serialization.Formatters.Binary;
 using System.IO;
 using System.Collections.Generic;
 using UnityEngine.UI;
 
 public class SaveLoadManager: MonoBehaviour {
 
    
 
     // Use this for initialization
     void Start () {
     
     }
     
     // Update is called once per frame
     void Update () {
     
     }
 
     public static void SavePlayer(UI_Holder player) {
         BinaryFormatter bf = new BinaryFormatter();
         FileStream stream = new FileStream(Application.persistentDataPath + "/player.sav", FileMode.Create);
 
         PlayerData data = new PlayerData(player);
 
         bf.Serialize(stream, data);
         stream.Close();
 
     }
 
     public static void LoadPlayer(UI_Holder main)
     {
         if (File.Exists(Application.persistentDataPath + "/player.sav"))
         {
             BinaryFormatter bf = new BinaryFormatter();
             FileStream stream = new FileStream(Application.persistentDataPath + "/player.sav", FileMode.Open);
 
             PlayerData data = bf.Deserialize(stream) as PlayerData;
             main.isSetupComplete = data.SetupComplete;
             main.SlotNumber = data.SlotNumber;
             main.Username = data.Username;
             main.SpawnChildrenScroll(data.ChildNumber);
             //main.Children = data.Children;
             stream.Close();
             
             
         }else
         {
             Debug.LogError("File does not exist.");
             //return new int[1];
         }
     }
 
 }
 
 [Serializable]
 public class PlayerData
 {
     public int SlotNumber;
     public bool SetupComplete;
     public string Username;
     public int ChildNumber;
     public int[] ChildrenPoints;
     public string[] ChildNames;
     public int[] ChildID;
 
   
 
 
     public PlayerData(UI_Holder player)
     {
         //Here you add the vars to save
         
         SetupComplete = player.isSetupComplete;
         SlotNumber = player.SlotNumber;
         Username = player.Username;
         ChildNumber = player.Children.Count;

// FOR LOOP GUILTY OF CHARGE

         /*for( int i=0; i < ChildNumber; i++)
         {
             ChildrenPoints[i] = player.Children[i].GetComponent<ChildScrollContainer>().ChildPoints;
             ChildNames[i] = player.Children[i].GetComponent<ChildScrollContainer>().ChildName;
             
         }*/
         //Children = player.Children;
     }
 }