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Windows Forms is a .NET UI framework for building Windows desktop applications.

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### Background and motivation I have a complex winform application and made multiple forms run message loops on independent threads, I registered ThreadException on each form's thread, and hope to...

api-suggestion
:construction: work in progress
untriaged

### Environment Microsoft Visual Studio Enterprise 2022 (64-bit) - Version 17.9.6 ### .NET version .NET 8 ### Did this work in a previous version of Visual Studio and/or previous .NET...

area-VSDesigner
area-Binding

### .NET version 8.0.7 ### Did it work in .NET Framework? No. ### Did it work in any of the earlier releases of .NET Core or .NET 5+? .Net 5...

area-HDPI-PMv2
area-HDPI

### .NET version .NET 10 SDK build: 10.0.100-alpha.1.24508.48 ### Did it work in .NET Framework? Yes ### Did it work in any of the earlier releases of .NET Core or...

area-VSDesigner
untriaged

Okay, so using Microsoft.WinForms.Designer.SDK solved it for me, but required one more change to the codebase. And for future searchers and finders of this topic: While the Assembly containing the...

Based on comment: https://github.com/dotnet/winforms/pull/9900#discussion_r1396556837 https://github.com/dotnet/winforms/blob/7a6f7349b6c57cc74f346498df279c2078818075/src/System.Windows.Forms/src/System/Windows/Forms/Dialogs/TaskDialog/TaskDialog.cs#L262-L274

tracking

### .NET version 8.0.7 ### Did it work in .NET Framework? No ### Did it work in any of the earlier releases of .NET Core or .NET 5+? Behavior is...

area-HDPI-SA
area-HDPI-PMv2
area-HDPI

### .NET version 9.0.0-rc.1 ### Did it work in .NET Framework? No ### Did it work in any of the earlier releases of .NET Core or .NET 5+? New feature...

area-DarkMode

### .NET version `main` ### Did it work in .NET Framework? No ### Did it work in any of the earlier releases of .NET Core or .NET 5+? No ###...

We are in the process of adding unit tests for all public methods to improve the test coverage of code. Here is a list categorized by namespace. System.Windows.Forms.Design - [x]...

help wanted
test-enhancement
:construction: work in progress