UltraToolbarsManager not working with .net core 5.0

I am using Infragistics.Winforms 2021 Vol 1 trial, with visual studio 16.10.2.

Ribbon abs cannot be added (here is error: constructor on type Infragistics.Win.UltraWinToolars.RibbonTab not found)

Toolbars collection is not working (no browse button)

how can I correct it

Hello Abdurrahman,

I am under the impression from your update that you are having difficulties using the UltraToolbarsManager in the Windows Forms designer. At the time of writing this, the UltraToolbarsManager does not have designer support in .NET 5, as there are a few controls we are still working on Windows Forms .NET Core 3.1 / .NET 5 designer support for. The full list of controls we do support can be found here: https://www.infragistics.com/help/winforms/whats-new-in-2021-volume-1. The UltraToolbarsManager should still be usable programmatically though.

I see that you are also targeting version 16.10.2 of Visual Studio 2019 – the 16.10.X updates for Visual Studio came out just after our release of version 21.1 and unfortunately broke some of our designer and NuGet compatibility. In order to fix this, I would recommend updating to the pre-release 21.1.32-ci build that can be found when using the Infragistics Licensed NuGet Feed and clicking the “include pre-release” checkbox. There is more information about the Infragistics NuGet feed here: https://www.infragistics.com/help/winforms/nuget-feeds.

Please let me know if you have any other questions or concerns on this matter.

Hi Andrew,
I've got a simmilar issue, regarding UltraToolbarsManager.

We are updating our companies app (which was a .NET Framework 4.7.1 Windows Forms Application) to .NET 6.0.

The application has a lot of Windows Forms user controls, which are inherited from a basic user control. There is a UltraToolbarsManager on the basic user control, which the inherited user controls are using to extend the context menu of the basic user control UltraToolbarsManager.

In our new .NET 6.0 application, in which we use the current Infragistics WinForms Release 21.2.46 via NuGet packages, everytime i do a minor change on one of the inherited user controls (such as resizing a UltraComboEditor), the VisualStudio 2022 Designer removes everything, which was related to the UltraToolbarsManager from the *.designer file, like the PopupMenuTools from the inherited user control context menu or the ButtonTools, which are used in the PopupMenuTool.

Can you tell me, if there exists a workaround to prevent the designer from deleting the UltraToolbarsManager related controls from the designer file?

Or alternatively, can you tell me, when you plan to add designer support in .NET 6.0 for the UltraToolbarsManager?