diff --git a/docs/en/Tutorials/Angular/Part-I.md b/docs/en/Tutorials/Angular/Part-I.md
index 65a7dc5714..2867a3159f 100644
--- a/docs/en/Tutorials/Angular/Part-I.md
+++ b/docs/en/Tutorials/Angular/Part-I.md
@@ -4,3 +4,5 @@
 
 * [With ASP.NET Core MVC / Razor Pages UI](../Part-1?UI=MVC)
 * [With Angular UI](../Part-1?UI=NG)
+
+<!-- TODO: this document has been moved, it should be deleted in the future. -->
\ No newline at end of file
diff --git a/docs/en/Tutorials/Angular/Part-II.md b/docs/en/Tutorials/Angular/Part-II.md
index 65a7dc5714..2867a3159f 100644
--- a/docs/en/Tutorials/Angular/Part-II.md
+++ b/docs/en/Tutorials/Angular/Part-II.md
@@ -4,3 +4,5 @@
 
 * [With ASP.NET Core MVC / Razor Pages UI](../Part-1?UI=MVC)
 * [With Angular UI](../Part-1?UI=NG)
+
+<!-- TODO: this document has been moved, it should be deleted in the future. -->
\ No newline at end of file
diff --git a/docs/en/Tutorials/Angular/Part-III.md b/docs/en/Tutorials/Angular/Part-III.md
index 65a7dc5714..2867a3159f 100644
--- a/docs/en/Tutorials/Angular/Part-III.md
+++ b/docs/en/Tutorials/Angular/Part-III.md
@@ -4,3 +4,5 @@
 
 * [With ASP.NET Core MVC / Razor Pages UI](../Part-1?UI=MVC)
 * [With Angular UI](../Part-1?UI=NG)
+
+<!-- TODO: this document has been moved, it should be deleted in the future. -->
\ No newline at end of file
diff --git a/docs/en/Tutorials/AspNetCore-Mvc/Part-I.md b/docs/en/Tutorials/AspNetCore-Mvc/Part-I.md
index 65a7dc5714..2867a3159f 100644
--- a/docs/en/Tutorials/AspNetCore-Mvc/Part-I.md
+++ b/docs/en/Tutorials/AspNetCore-Mvc/Part-I.md
@@ -4,3 +4,5 @@
 
 * [With ASP.NET Core MVC / Razor Pages UI](../Part-1?UI=MVC)
 * [With Angular UI](../Part-1?UI=NG)
+
+<!-- TODO: this document has been moved, it should be deleted in the future. -->
\ No newline at end of file
diff --git a/docs/en/Tutorials/AspNetCore-Mvc/Part-II.md b/docs/en/Tutorials/AspNetCore-Mvc/Part-II.md
index 65a7dc5714..2867a3159f 100644
--- a/docs/en/Tutorials/AspNetCore-Mvc/Part-II.md
+++ b/docs/en/Tutorials/AspNetCore-Mvc/Part-II.md
@@ -4,3 +4,5 @@
 
 * [With ASP.NET Core MVC / Razor Pages UI](../Part-1?UI=MVC)
 * [With Angular UI](../Part-1?UI=NG)
+
+<!-- TODO: this document has been moved, it should be deleted in the future. -->
\ No newline at end of file
diff --git a/docs/en/Tutorials/AspNetCore-Mvc/Part-III.md b/docs/en/Tutorials/AspNetCore-Mvc/Part-III.md
index 65a7dc5714..2867a3159f 100644
--- a/docs/en/Tutorials/AspNetCore-Mvc/Part-III.md
+++ b/docs/en/Tutorials/AspNetCore-Mvc/Part-III.md
@@ -4,3 +4,5 @@
 
 * [With ASP.NET Core MVC / Razor Pages UI](../Part-1?UI=MVC)
 * [With Angular UI](../Part-1?UI=NG)
+
+<!-- TODO: this document has been moved, it should be deleted in the future. -->
\ No newline at end of file