Liv-Goh

When the helpNamespace property in helpProvider is blank after delete the previous saved URL, project exit from runtime automatically when press F1

11

### .NET version .NET 9.0 SDK build: 9.0.100-preview.7.24321.3 ### Did it work in .NET Framework? Yes ### Did it work in any of the earlier releases of .NET Core or...

Add unit test for UpDownBaseDesigner

1

Related https://github.com/dotnet/winforms/issues/10773 ## Proposed changes 1. Add unit test UpDownBaseDesignerTests.cs for public properties and method of the UpDownBaseDesigner. 2. Enable nullability in UpDownBaseDesignerTests.cs. ###### Microsoft Reviewers: [Open in CodeFlow](https://microsoft.github.io/open-pr/?codeflow=https://github.com/dotnet/winforms/pull/12364)

### Type of issue Other (describe below) ### Description The current documentation states that if the ShowSelectionMargin property is set to true, setting the ScrollBars property to RichTextBoxScrollBars.Horizontal, RichTextBoxScrollBars.Vertical, or...

[Dark Mode]HelpProvider text color is barely visible

2

### .NET version 9.0.0-rc.1.24418.2 + build private dll from winforms repo main branch ### Did it work in .NET Framework? No ### Did it work in any of the earlier...