ElementHost control (Wpf Interoperability) do not display in Toolbox WinForms designer And Can not add Wpf UserControl in winform designer

[MauNguyenVan]

Environment

VisualStudio 17.6.4

.NET version

• Windows Form App template
• .NET core 7.0

Did this work in a previous version of Visual Studio and/or previous .NET release?

It works in .NET framework 4.8

Issue description

• Can not display ElementHost (Wpf Interoperability)

• Can not add Wpf UserControl in the Winform in design mode

Steps to reproduce

• Create a new Windows Form App project with a target framework 7.0.
• Open Form1.cs in design mode
• Open Toolbox then search ElementHost (not found this control)

Image WinFormApp .net core 7.0

But with .net framework 4.8 has it and works fine

Diagnostics

No response

[elachlan]

@Olina-Zhang can you check if this repros in .net 6 please?

[MauNguyenVan]

In my computer, .NET 6 has the same error

[elachlan]

Much appreciated. Team will need to have a look.

[Olina-Zhang]

@Olina-Zhang can you check if this repros in .net 6 please?

There are known issues in Winforms designer repo: https://github.com/microsoft/winforms-designer/issues/919, https://github.com/microsoft/winforms-designer/issues/2626.

[MauNguyenVan]

@Olina-Zhang can you check if this repros in .net 6 please?

There are known issues in Winforms designer repo: https://github.com/microsoft/winforms-designer/issues/919, https://github.com/microsoft/winforms-designer/issues/2626.

Sorry, these URLs do not exist. maybe i have not permission

[elachlan]

@MauNguyenVan the designer repo is currently closed source.

[merriemcgaw]

This is known work that we have on our backlog in our private Designer repo. We don't have a specific timeline yet. We will keep you posted.