[BUG] AppThemeObject<T>.GetBinding calls inaccessible method

[breyed]

Is there an existing issue for this?

• I have searched the existing issues

Did you read the "Reporting a bug" section on Contributing file?

• I have read the "Reporting a bug" section on Contributing file: https://github.com/CommunityToolkit/Maui/blob/main/CONTRIBUTING.md#reporting-a-bug

Current Behavior

AppThemeObject<T>.GetBinding throws an exception when called by CommunityToolkit 14.0.0 with Microsoft.Maui.Controls 10.0.40.

 Method Microsoft.Maui.Controls.AppThemeBinding..ctor()' is inaccessible from method CommunityToolkit.Maui.AppThemeObject`1[Microsoft.Maui.Graphics.Color].GetBinding()'
   at CommunityToolkit.Maui.AppThemeObject`1[[Microsoft.Maui.Graphics.Color, Microsoft.Maui.Graphics, Version=10.0.0.0, Culture=neutral, PublicKeyToken=null]].GetBinding()

Expected Behavior

No exception. Works the same as with Microsoft.Maui.Controls 10.0.31.

Steps To Reproduce

new AppThemeColor { Light = new Color(0, 0, 0, 1), Dark = new Color(1, 1, 1, 1) }.GetBinding()

Link to public reproduction project repository

https://github.com/breyed/maui-set-binding

Environment

- .NET MAUI CommunityToolkit: 14.0.0
- OS: macOS 26.3 (tested on Android)
- .NET MAUI: 10.0.40

Anything else?

Related: #3089, dotnet/maui#33442

[TheCodeTraveler]

This appears to be a breaking change in the latest version of .NET / .NET MAUI.

I'm looking into it now.

Related Isues:

• [BUG] snackbar.Show fails on Microsoft.Maui.Controls Version="10.0.40" #3093
• [BUG] AppThemeObject<T>.GetBinding calls inaccessible method #3092
• [BUG] TouchBehavior fails with MethodAccessException when using MAUI 9.0.40 #3089

[TheCodeTraveler]

I've confirmed that this is a bug introduced in Microsoft.Maui.Controls v10.0.40

Workaround

To use CommunityToolkit.Maui v14.0.0, downgrade to Microsoft.Maui.Controls v10.0.31

[TheCodeTraveler]

Closing as a duplicate in order to consolidate our work into one GitHub Issue