,ArgumentOutOfRangeException: Index was out of range.

Error Message: ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index ` using System.Collections.Generic; using UnityEngine; using UnityEngine.UI; public class ButtonManager : MonoBehaviour { #region Variables [Header("Scroll Settings")] [SerializeField] private Scrollbar scrollbarHorizontal; [Header("Buttons Reference")] [SerializeField] private GameObject bottomPanel; private List bottomPanelButtonsList = new(); private List scrollbarValuesList = new(); private int listCount; private const float scrollbarValueForShop = 0f; private const float scrollbarValueForLeaderboard = 0.25f; private const float scrollbarValueForHome = 0.5f; private const float scrollbarValueForFriends = 0.75f; private const float scrollbarValueForSettings = 1; #endregion #region In-Built Functions private void Awake() { scrollbarHorizontal.value = scrollbarValueForHome; //To always start from Home PopulateButtonList(); PopulateScrollbarValueList(); } private void Start() { OnButtonClick(); } #endregion #region Custom Functions private void PopulateButtonList() { if (bottomPanelButtonsList != null) { bottomPanelButtonsList.AddRange(bottomPanel.GetComponentsInChildren()); Debug.Log("Button List Populated"); } else { bottomPanelButtonsList = new(); } } private void PopulateScrollbarValueList() { if (scrollbarValuesList != null) { scrollbarValuesList.Add(scrollbarValueForShop); scrollbarValuesList.Add(scrollbarValueForLeaderboard); scrollbarValuesList.Add(scrollbarValueForHome); scrollbarValuesList.Add(scrollbarValueForFriends); scrollbarValuesList.Add(scrollbarValueForSettings); Debug.Log("Float List Populated"); } else { scrollbarValuesList = new(); } } private void OnButtonClick() { if (bottomPanelButtonsList.Count == scrollbarValuesList.Count) { listCount = bottomPanelButtonsList.Count; Debug.Log($"{listCount}"); //5 for (int i = 1; i < listCount; i++) { //bottomPanelButtonsList[0].onClick.AddListener(() => scrollbarHorizontal.value = scrollbarValuesList[0]); //bottomPanelButtonsList[1].onClick.AddListener(() => scrollbarHorizontal.value = scrollbarValuesList[1]); //bottomPanelButtonsList[2].onClick.AddListener(() => scrollbarHorizontal.value = scrollbarValuesList[2]); //bottomPanelButtonsList[3].onClick.AddListener(() => scrollbarHorizontal.value = scrollbarValuesList[3]); //bottomPanelButtonsList[4].onClick.AddListener(() => scrollbarHorizontal.value = scrollbarValuesList[4]); bottomPanelButtonsList[i].onClick.AddListener(() => scrollbarHorizontal.value = scrollbarValuesList[i]); //Error Here } } } #endregion } ` , using System.Collections.Generic; using UnityEngine; using UnityEngine.UI; public class ButtonManager : MonoBehaviour { #region Variables [Header("Scroll Settings")] [SerializeField] private Scrollbar scrollbarHorizontal; [Header("Buttons Reference")] [SerializeField] private GameObject bottomPanel; private List bottomPanelButtonsList = new(); private List scrollbarValuesList = new(); private int listCount; private const float scrollbarValueForShop = 0f; private const float scrollbarValueForLeaderboard = 0.25f; private const float scrollbarValueForHome = 0.5f; private const float scrollbarValueForFriends = 0.75f; private const float scrollbarValueForSettings = 1; #endregion #region In-Built Functions private void Awake() { scrollbarHorizontal.value = scrollbarValueForHome; //To always start from Home PopulateButtonList(); PopulateScrollbarValueList(); } private void Start() { OnButtonClick(); } #endregion #region Custom Functions private void PopulateButtonList() { if (bottomPanelButtonsList != null) { bottomPanelButtonsList.AddRange(bottomPanel.GetComponentsInChildren()); Debug.Log("Button List Populated"); } else { bottomPanelButtonsList = new(); } } private void PopulateScrollbarValueList() { if (scrollbarValuesList != null) { scrollbarValuesList.Add(scrollbarValueForShop); scrollbarValuesList.Add(scrollbarValueForLeaderboard); scrollbarValuesList.Add(scrollbarValueForHome); scrollbarValuesList.Add(scrollbarValueForFriends); scrollbarValuesList.Add(scrollbarValueForSettings); Debug.Log("Float List Populated"); } else { scrollbarValuesList = new(); } } private void OnButtonClick() { if (bottomPanelButtonsList.Count == scrollbarValuesList.Count) { listCount = bottomPanelButtonsList.Count; Debug.Log($"{listCount}"); //5 for (int i = 1; i < listCount; i++) { //bottomPanelButtonsList[0].onClick.AddListener(() => scrollbarHorizontal.value = scrollbarValuesList[0]); //bottomPanelButtonsList[1].onClick.AddListener(() => scrollbarHorizontal.value = scrollbarValuesList[1]); //bottomPanelButtonsList[2].onClick.AddListener(() => scrollbarHorizontal.value = scrollbarValuesList[2]); //bottomPanelButtonsList[3].onClick.AddListener(() => scrollbarHorizontal.value = scrollbarValuesList[3]); //bottomPanelButtonsList[4].onClick.AddListener(() => scrollbarHorizontal.value = scrollbarValuesList[4]); bottomPanelButtonsList[i].onClick.AddListener(() => scrollbarHorizontal.value = scrollbarValuesList[i]); } } } #endregion } Error Message: ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index System.Collections.Generic.List`1[T].get_Item (System.Int32 index) (at <9aad1b3a47484d63ba2b3985692d80e9>:0) ButtonManager+<>c__DisplayClass14_0.b__0 () (at Assets/Scripts/ButtonManager.cs:88)