materialToolStripMenuItem can't add item to DropDownItems

[idea-zone]

materialToolStripMenuItem can't add item to DropDownItems, it's show bad and throw ERROR on Running.

I am is here:
.NET 5.0.403;
VS2019 16.11.7;
MaterialSkin.NET5 1.0.1;

Here is DesignMode:

   Exception:  System.NullReferenceException;
   Error Message: Object reference not set to an instance of an object;
   HResult:   -2147467261;
   StackTrace: 
   at System.Windows.Forms.Layout.CommonProperties.xClearPreferredSizeCache(IArrangedElement element)
   at System.Windows.Forms.ToolStripDropDown.OnOwnerItemFontChanged(EventArgs e)
   at System.Windows.Forms.ToolStripDropDownItem.OnFontChanged(EventArgs e)
   at System.Windows.Forms.ToolStripMenuItem.OnFontChanged(EventArgs e)
   at System.Windows.Forms.ToolStripItem.OnOwnerFontChanged(EventArgs e)
   at System.Windows.Forms.ToolStrip.OnFontChanged(EventArgs e)
   at System.Windows.Forms.Control.set_Font(Font value)
   at System.Windows.Forms.ToolStrip.set_Font(Font value)
   at MaterialSkin.Controls.MaterialMenuStrip.OnCreateControl()
   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   at System.Windows.Forms.Control.CreateControl()
   at System.Windows.Forms.Control.WmShowWindow(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at System.Windows.Forms.ContainerControl.WndProc(Message& m)
   at System.Windows.Forms.Form.WmShowWindow(Message& m)
   at System.Windows.Forms.Form.WndProc(Message& m)
   at MaterialSkin.Controls.MaterialForm.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, WM msg, IntPtr wparam, IntPtr lparam)

[bubuntoid]

Hello @idea-zone
I fixed up rendering issue, but didn`t get any exception that you described. Could you share your form sources somewhere?

[bubuntoid]

1.0.2 released https://www.nuget.org/packages/MaterialSkin.NET5/

[idea-zone]

Thank you for your work！Here is my Test Project: TestMterial.NET5.zip. My Develop's OS is Winodws 10.

Running Info

all dotnet version on my computer

[bubuntoid]

@idea-zone I suppose you edited Form1.Designer by yourself.

P.S. left code block is from your sources and right is exceptionless fix

I suggest you to recreate MaterialMenuStrip control with using just VS form editor

[idea-zone]

I do it with just VS form editor. But I use the red-marked item:

I find it when I use "MaterialToolStripMenuItem" ,it cannot has "MaterialToolStripMenuItem" as DropDownItems , but when I use "MenuItem", it's work .

But there is one rendering issue when I use MenuItem as top-item and MaterialToolStripMenuItem as DropDownItems :

Thanks very much for you help.

[bubuntoid]

You should use only default System.Windows.Forms.ToolStripMenuItem.

Is there any reason to use MaterialToolStripMenuItem in your project?