From cc0c174006ba69fe80e634f323ea1a9fe704df5d Mon Sep 17 00:00:00 2001
From: Ilkay Ilknur <ilkay@ilkayilknur.com>
Date: Tue, 30 Mar 2021 16:37:39 +0300
Subject: [PATCH 1/3] render toolbar childcontent for backwards compatibility.

---
 .../Layout/PageHeader.razor                                  | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/framework/src/Volo.Abp.AspNetCore.Components.Web.Theming/Layout/PageHeader.razor b/framework/src/Volo.Abp.AspNetCore.Components.Web.Theming/Layout/PageHeader.razor
index aec0eada09..d874da0901 100644
--- a/framework/src/Volo.Abp.AspNetCore.Components.Web.Theming/Layout/PageHeader.razor
+++ b/framework/src/Volo.Abp.AspNetCore.Components.Web.Theming/Layout/PageHeader.razor
@@ -32,6 +32,11 @@
     }
     <Column>
         <Row Class="justify-content-end mx-n1">
+            @if (Toolbar == null)
+            {
+                @ChildContent
+            }
+            
             @foreach (var toolbarItemRender in ToolbarItemRenders)
             {
                 <Column ColumnSize="ColumnSize.IsAuto" Class="px-1 pt-2">

From 131dece60a1b92df9784961723e15e183f78037a Mon Sep 17 00:00:00 2001
From: Ilkay Ilknur <ilkay@ilkayilknur.com>
Date: Tue, 30 Mar 2021 16:37:55 +0300
Subject: [PATCH 2/3] remove unused parameter.

---
 .../Layout/PageHeader.razor.cs                                 | 3 ---
 1 file changed, 3 deletions(-)

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 fb2db1b8a2..7806aa4b44 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
@@ -31,9 +31,6 @@ namespace Volo.Abp.AspNetCore.Components.Web.Theming.Layout
         [Parameter] 
         public PageToolbar Toolbar { get; set; }
 
-        [Parameter]
-        public string PageName { get; set; }
-
         public PageHeader()
         {
             BreadcrumbItems = new List<BreadcrumbItem>();

From a43c68bbffc865bf58f4cfea26a07eeaae780f49 Mon Sep 17 00:00:00 2001
From: Ilkay Ilknur <ilkay@ilkayilknur.com>
Date: Tue, 30 Mar 2021 16:45:16 +0300
Subject: [PATCH 3/3] pageheader namespace change added.

---
 docs/en/Migration-Guides/Abp-4_3.md | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/docs/en/Migration-Guides/Abp-4_3.md b/docs/en/Migration-Guides/Abp-4_3.md
index c4541a6581..6464455011 100644
--- a/docs/en/Migration-Guides/Abp-4_3.md
+++ b/docs/en/Migration-Guides/Abp-4_3.md
@@ -1,3 +1,6 @@
 # ABP Framework 4.x to 4.3 Migration Guide
 
-TODO
\ No newline at end of file
+## Blazor UI
+
+- `PageHeader` component has been moved to the`Volo.Abp.AspNetCore.Components.Web.Theming.Layout` namespace.
+