Discussed in #653

Currently this is possible in WPF/WinForms via:

AppDomain.CurrentDomain.UnhandledException += (sender, error) =>
{
    MessageBox.Show(text: error.ExceptionObject.ToString(), caption: "Error");
};

The ask of this issue is to enable AppDomain.CurrentDomain.UnhandledException for MAUI based applications to support a global exception handling mechanism.

I looked into the Windows MAUI WinUI3 end of things, and there appears to be a potential bug with the DispatcherQueue which prevents the application from being sent to the AppDomain.CurrentDomain.UnhandledException: microsoft/microsoft-ui-xaml#5221

cc/ @hartez @mattleibow

Blazor Hybrid

Cross linking dotnet/aspnetcore#40765 which handles the case of WPF/WinForms in Blazor Hybrid. If there's a canonical way to do global exception handling (like we have in WinForms/WPF), we need to ensure .NET MAUI Blazor Hybrid is able to integrate with it directly.

Blazor Hybrid MAUI tracking issue: #4441

• WPF/WinForms Blazor WebView Exception Handling aspnetcore#40765
• App.UnhandledException doesn't catch exceptions from other threads. microsoft/microsoft-ui-xaml#5221
• [Blazor webview] Exception handling for blazor webview #4441
• MAUI: enable AppDomain.CurrentDomain.UnhandledException for MAUI based applications to support a global exception handling mechanism