diff --git a/framework/src/Volo.Abp.AspNetCore.Components.Web.Theming/Layout/PageHeader.razor.cs b/framework/src/Volo.Abp.AspNetCore.Components.Web.Theming/Layout/PageHeader.razor.cs
index f38f433fa3..ea0b810765 100644
--- a/framework/src/Volo.Abp.AspNetCore.Components.Web.Theming/Layout/PageHeader.razor.cs
+++ b/framework/src/Volo.Abp.AspNetCore.Components.Web.Theming/Layout/PageHeader.razor.cs
@@ -33,7 +33,14 @@ public partial class PageHeader : ComponentBase
     [Parameter] // TODO: Consider removing this property in future and use only PageLayout.
     public List<BreadcrumbItem> BreadcrumbItems {
         get => PageLayout.BreadcrumbItems.ToList();
-        set => PageLayout.BreadcrumbItems = new ObservableCollection<BreadcrumbItem>(value);
+        set 
+        {
+            PageLayout.BreadcrumbItems.Clear();
+            foreach (var item in value)
+            {
+                PageLayout.BreadcrumbItems.Add(item);
+            }
+        }
     }
 
     [Parameter]
diff --git a/framework/src/Volo.Abp.AspNetCore.Components.Web.Theming/Layout/PageLayout.cs b/framework/src/Volo.Abp.AspNetCore.Components.Web.Theming/Layout/PageLayout.cs
index 3edbb9dc45..4d04bd2ad7 100644
--- a/framework/src/Volo.Abp.AspNetCore.Components.Web.Theming/Layout/PageLayout.cs
+++ b/framework/src/Volo.Abp.AspNetCore.Components.Web.Theming/Layout/PageLayout.cs
@@ -23,20 +23,21 @@ public class PageLayout : IScopedDependency, INotifyPropertyChanged
     private string menuItemName;
 
     public string MenuItemName {
-         get => menuItemName; 
-         set {
+        get => menuItemName;
+        set
+        {
             menuItemName = value;
             OnPropertyChanged();
-         }
+        }
     }
 
-    public virtual ObservableCollection<BreadcrumbItem> BreadcrumbItems { get; set; } = new();
+    public virtual ObservableCollection<BreadcrumbItem> BreadcrumbItems { get; } = new();
 
-    public virtual ObservableCollection<PageToolbarItem> ToolbarItems { get; set; } = new();
+    public virtual ObservableCollection<PageToolbarItem> ToolbarItems { get; } = new();
 
     public event PropertyChangedEventHandler PropertyChanged;
 
-    protected void OnPropertyChanged([CallerMemberName]string propertyName = null)
+    protected void OnPropertyChanged([CallerMemberName] string propertyName = null)
     {
         PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
     }