diff --git a/src/System.Windows.Forms/src/System/Windows/Forms/Control.cs b/src/System.Windows.Forms/src/System/Windows/Forms/Control.cs
index dacaaeb5bbf..27691191a50 100644
--- a/src/System.Windows.Forms/src/System/Windows/Forms/Control.cs
+++ b/src/System.Windows.Forms/src/System/Windows/Forms/Control.cs
@@ -12858,6 +12858,7 @@ internal ToolStripControlHost? ToolStripControlHost
         UrlFormat = Obsoletions.SharedUrlFormat)]
     [EditorBrowsable(EditorBrowsableState.Never)]
     [Browsable(false)]
+    [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
     public virtual ContextMenu ContextMenu
     {
         get;
@@ -12875,6 +12876,7 @@ public virtual ContextMenu ContextMenu
 
     [EditorBrowsable(EditorBrowsableState.Never)]
     [Browsable(false)]
+    [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
     public event EventHandler ContextMenuChanged
     {
         add { }
@@ -12891,6 +12893,7 @@ public event EventHandler ContextMenuChanged
         UrlFormat = Obsoletions.SharedUrlFormat)]
     [EditorBrowsable(EditorBrowsableState.Never)]
     [Browsable(false)]
+    [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
     protected virtual void OnContextMenuChanged(EventArgs e) { }
 #nullable enable
 }
diff --git a/src/System.Windows.Forms/src/System/Windows/Forms/Form.cs b/src/System.Windows.Forms/src/System/Windows/Forms/Form.cs
index 026e8c5851a..108939df682 100644
--- a/src/System.Windows.Forms/src/System/Windows/Forms/Form.cs
+++ b/src/System.Windows.Forms/src/System/Windows/Forms/Form.cs
@@ -7140,6 +7140,7 @@ protected override void WndProc(ref Message m)
         UrlFormat = Obsoletions.SharedUrlFormat)]
     [EditorBrowsable(EditorBrowsableState.Never)]
     [Browsable(false)]
+    [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
     public MainMenu Menu
     {
         get;
@@ -7156,6 +7157,7 @@ public MainMenu Menu
         UrlFormat = Obsoletions.SharedUrlFormat)]
     [EditorBrowsable(EditorBrowsableState.Never)]
     [Browsable(false)]
+    [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
     public MainMenu MergedMenu
     {
         get;