diff --git a/src/BootstrapBlazor.Server/Components/Samples/TreeViews.razor.cs b/src/BootstrapBlazor.Server/Components/Samples/TreeViews.razor.cs
index 45fdeba725e..f3c5919083a 100644
--- a/src/BootstrapBlazor.Server/Components/Samples/TreeViews.razor.cs
+++ b/src/BootstrapBlazor.Server/Components/Samples/TreeViews.razor.cs
@@ -117,7 +117,7 @@ private Task OnMaxSelectedCountExceed()
         return ToastService.Information(Localizer["OnMaxSelectedCountExceedTitle"], Localizer["OnMaxSelectedCountExceedContent", 2]);
     }
 
-    private Task OnTreeItemChecked(List<TreeViewItem<TreeFoo>> items)
+    private Task OnTreeItemChecked(IList<TreeViewItem<TreeFoo>> items)
     {
         Logger2.Log($"当前共选中{items.Count}项");
         return Task.CompletedTask;
@@ -149,7 +149,7 @@ private static Task OnFormTreeItemClick(TreeViewItem<TreeFoo> item)
         return Task.CompletedTask;
     }
 
-    private Task OnTreeItemChecked2(List<TreeViewItem<TreeFoo>> items)
+    private Task OnTreeItemChecked2(IList<TreeViewItem<TreeFoo>> items)
     {
         Logger3.Log($"当前共选中{items.Count}项");
         return Task.CompletedTask;
@@ -191,7 +191,7 @@ private Task SelectedItemOnChanged(SelectedItem selectedItem)
         return ret;
     }
 
-    private static async Task<List<TreeViewItem<TreeFoo>>?> OnSearchAsync(string searchText)
+    private static async Task<IList<TreeViewItem<TreeFoo>>?> OnSearchAsync(string searchText)
     {
         await Task.Delay(20);
 
diff --git a/src/BootstrapBlazor/Components/TreeView/TreeView.razor.cs b/src/BootstrapBlazor/Components/TreeView/TreeView.razor.cs
index a1b1a7aacd2..02fd5ea4647 100644
--- a/src/BootstrapBlazor/Components/TreeView/TreeView.razor.cs
+++ b/src/BootstrapBlazor/Components/TreeView/TreeView.razor.cs
@@ -158,20 +158,20 @@ public partial class TreeView<TItem> : IModelEqualityComparer<TItem>
     /// </summary>
     /// <remarks>通过设置 <see cref="ShowSearch"/> 开启</remarks>
     [Parameter]
-    public Func<string?, Task<List<TreeViewItem<TItem>>?>>? OnSearchAsync { get; set; }
+    public Func<string?, Task<IList<TreeViewItem<TItem>>?>>? OnSearchAsync { get; set; }
 
     /// <summary>
     /// 获得/设置 带层次数据集合
     /// </summary>
     [Parameter]
     [NotNull]
-    public List<TreeViewItem<TItem>>? Items { get; set; }
+    public IList<TreeViewItem<TItem>>? Items { get; set; }
 
     ///// <summary>
     ///// 获得/设置 扁平化数据集合注意 <see cref="TreeViewItem{TItem}.Parent"/> 参数一定要赋值，不然无法呈现层次结构
     ///// </summary>
     //[Parameter]
-    //public List<TreeViewItem<TItem>>? FlatItems { get; set; }
+    //public IList<TreeViewItem<TItem>>? FlatItems { get; set; }
 
     /// <summary>
     /// 获得/设置 是否显示 CheckBox 默认 false 不显示
@@ -207,7 +207,7 @@ public partial class TreeView<TItem> : IModelEqualityComparer<TItem>
     /// 获得/设置 树形控件节点选中时回调委托
     /// </summary>
     [Parameter]
-    public Func<List<TreeViewItem<TItem>>, Task>? OnTreeItemChecked { get; set; }
+    public Func<IList<TreeViewItem<TItem>>, Task>? OnTreeItemChecked { get; set; }
 
     /// <summary>
     /// 获得/设置 点击节点获取子数据集合回调方法
@@ -450,7 +450,7 @@ public async ValueTask TriggerKeyDown(string key)
     /// <param name="items"></param>
     /// <returns></returns>
     [JSInvokable]
-    public Task<List<CheckboxState>> GetParentsState(List<int> items)
+    public Task<IList<CheckboxState>> GetParentsState(IList<int> items)
     {
         var rows = Rows;
         var result = items.Select(i =>
@@ -464,12 +464,12 @@ public Task<List<CheckboxState>> GetParentsState(List<int> items)
             item.CheckedState = checkedState;
             return checkedState;
         }).ToList();
-        return Task.FromResult(result);
+        return Task.FromResult<IList<CheckboxState>>(result);
     }
 
     private static bool IsExpand(TreeViewItem<TItem> item) => item.IsExpand && item.Items.Count > 0;
 
-    private List<TreeViewItem<TItem>> GetItems(TreeViewItem<TItem> item) => item.Parent?.Items ?? Items;
+    private IList<TreeViewItem<TItem>> GetItems(TreeViewItem<TItem> item) => item.Parent?.Items ?? Items;
 
     private async Task ActiveTreeViewItem(string key, TreeViewItem<TItem> item)
     {
@@ -615,7 +615,7 @@ private async Task OnEnterAsync(string? searchText)
 
     private Task OnEscAsync(string? searchText) => OnClickResetSearch();
 
-    private List<TreeViewItem<TItem>>? _searchItems;
+    private IList<TreeViewItem<TItem>>? _searchItems;
 
     private async Task OnClickSearch()
     {
@@ -649,7 +649,7 @@ public void SetActiveItem(TreeViewItem<TItem>? item)
     /// <summary>
     /// 重新设置 <see cref="Items"/> 数据源方法
     /// </summary>
-    public void SetItems(List<TreeViewItem<TItem>> items)
+    public void SetItems(IList<TreeViewItem<TItem>> items)
     {
         //FlatItems = null;
         Items = items;
@@ -661,7 +661,7 @@ public void SetItems(List<TreeViewItem<TItem>> items)
     ///// 重新设置 <see cref="FlatItems"/> 数据源方法
     ///// </summary>
     ///// <param name="flatItems"></param>
-    //public void SetFlatItems(List<TreeViewItem<TItem>> flatItems)
+    //public void SetFlatItems(IList<TreeViewItem<TItem>> flatItems)
     //{
     //    Items = null;
     //    FlatItems = flatItems;
@@ -793,7 +793,7 @@ private async Task OnCheckStateChanged(TreeViewItem<TItem> item, CheckboxState s
     /// </summary>
     public void ClearCheckedItems()
     {
-        Items.ForEach(item =>
+        foreach (var item in Items)
         {
             item.CheckedState = CheckboxState.UnChecked;
             TreeNodeStateCache.ToggleCheck(item);
@@ -802,7 +802,7 @@ public void ClearCheckedItems()
                 s.CheckedState = CheckboxState.UnChecked;
                 TreeNodeStateCache.ToggleCheck(s);
             });
-        });
+        }
         StateHasChanged();
     }
 
@@ -879,9 +879,9 @@ private void OnTouchEnd()
         TouchStart = false;
     }
 
-    private List<TreeViewItem<TItem>>? _rows = null;
+    private IList<TreeViewItem<TItem>>? _rows = null;
 
-    private List<TreeViewItem<TItem>> Rows
+    private IList<TreeViewItem<TItem>> Rows
     {
         get
         {
@@ -891,7 +891,7 @@ private List<TreeViewItem<TItem>> Rows
         }
     }
 
-    private List<TreeViewItem<TItem>> GetTreeItems() => _searchItems ?? Items;
+    private IList<TreeViewItem<TItem>> GetTreeItems() => _searchItems ?? Items;
 
     private static string? GetTreeRowStyle(TreeViewItem<TItem> item)
     {
diff --git a/src/BootstrapBlazor/Misc/ExpandableNodeCache.cs b/src/BootstrapBlazor/Misc/ExpandableNodeCache.cs
index 409e3380932..018dc7342f7 100644
--- a/src/BootstrapBlazor/Misc/ExpandableNodeCache.cs
+++ b/src/BootstrapBlazor/Misc/ExpandableNodeCache.cs
@@ -130,7 +130,7 @@ public async Task CheckExpandAsync(TNode node, Func<TNode, Task<IEnumerable<IExp
     /// <param name="ret">查询结果 查无资料时为 null</param>
     /// <returns>是否存在 <paramref name="target"/></returns>
     /// <remarks>采广度优先搜寻</remarks>
-    public bool TryFind(List<TNode> items, TItem target, [MaybeNullWhen(false)] out TNode ret)
+    public bool TryFind(IList<TNode> items, TItem target, [MaybeNullWhen(false)] out TNode ret)
     {
         ret = Find(items, target);
         return ret != null;
@@ -143,7 +143,7 @@ public bool TryFind(List<TNode> items, TItem target, [MaybeNullWhen(false)] out
     /// <param name="target"></param>
     /// <returns>查询结果 查无资料时为 null</returns>
     /// <remarks>采广度优先搜寻</remarks>
-    private TNode? Find(List<TNode> items, TItem target) => Find(items, target, out _);
+    private TNode? Find(IList<TNode> items, TItem target) => Find(items, target, out _);
 
     /// <summary>
     /// 在全部树状结构 <paramref name="source"/> 中寻找指定 <paramref name="target"/>
@@ -153,7 +153,7 @@ public bool TryFind(List<TNode> items, TItem target, [MaybeNullWhen(false)] out
     /// <param name="degree">树状阶层，起始为0</param>
     /// <returns>查询结果 查无资料时为 null</returns>
     /// <remarks>采广度优先搜寻</remarks>
-    public TNode? Find(List<TNode> source, TItem target, out int degree)
+    public TNode? Find(IList<TNode> source, TItem target, out int degree)
     {
         degree = -1;
         var ret = source.FirstOrDefault(item => EqualityComparer.Equals(item.Value, target));
diff --git a/src/BootstrapBlazor/Misc/TreeNodeCache.cs b/src/BootstrapBlazor/Misc/TreeNodeCache.cs
index 76e5fc37566..be005a3bb24 100644
--- a/src/BootstrapBlazor/Misc/TreeNodeCache.cs
+++ b/src/BootstrapBlazor/Misc/TreeNodeCache.cs
@@ -92,7 +92,7 @@ private void IsChecked(TNode node)
         CheckChildren(nodes, node);
     }
 
-    private void CheckChildren(List<ICheckableNode<TItem>> nodes, TNode node)
+    private void CheckChildren(IList<ICheckableNode<TItem>> nodes, TNode node)
     {
         if (nodes.Count != 0)
         {
@@ -123,7 +123,7 @@ private void CheckChildren(List<ICheckableNode<TItem>> nodes, TNode node)
     /// 重置是否选中状态
     /// </summary>
     /// <param name="nodes"></param>
-    public void IsChecked(List<TNode> nodes)
+    public void IsChecked(IList<TNode> nodes)
     {
         if (nodes.Count != 0)
         {
@@ -131,7 +131,7 @@ public void IsChecked(List<TNode> nodes)
         }
     }
 
-    private void ResetCheckNodes(List<TNode> items)
+    private void ResetCheckNodes(IList<TNode> items)
     {
         // 恢复当前节点状态
         foreach (var node in items)
@@ -153,7 +153,7 @@ private void ResetCheckNodes(List<TNode> items)
     /// <param name="nodes">数据集合</param>
     /// <param name="node">指定节点</param>
     /// <returns></returns>
-    public TNode? FindParentNode(List<TNode> nodes, TNode node)
+    public TNode? FindParentNode(IList<TNode> nodes, TNode node)
     {
         TNode? ret = default;
         foreach (var treeNode in nodes)