Fix missing descriptions in metadata

[adegeo]

---

Internal previews

📄 File	🔗 Preview link
dotnet-desktop-guide/winforms/controls/how-to-add-columns-to-the-windows-forms-listview-control-using-the-designer.md	dotnet-desktop-guide/winforms/controls/how-to-add-columns-to-the-windows-forms-listview-control-using-the-designer
dotnet-desktop-guide/winforms/controls/how-to-create-an-mdi-form-with-menu-merging-and-toolstrip-controls.md	dotnet-desktop-guide/winforms/controls/how-to-create-an-mdi-form-with-menu-merging-and-toolstrip-controls
dotnet-desktop-guide/winforms/controls/windows-forms-controls-by-function.md	dotnet-desktop-guide/winforms/controls/windows-forms-controls-by-function
dotnet-desktop-guide/winforms/dialog-boxes-in-windows-forms.md	dotnet-desktop-guide/winforms/dialog-boxes-in-windows-forms
dotnet-desktop-guide/winforms/how-to-change-the-borders-of-windows-forms.md	dotnet-desktop-guide/winforms/how-to-change-the-borders-of-windows-forms
dotnet-desktop-guide/wpf/graphics-multimedia/how-to-define-a-pen.md	dotnet-desktop-guide/wpf/graphics-multimedia/how-to-define-a-pen
dotnet-desktop-guide/wpf/graphics-multimedia/how-to-define-a-rectangle-using-a-rectanglegeometry.md	dotnet-desktop-guide/wpf/graphics-multimedia/how-to-define-a-rectangle-using-a-rectanglegeometry

[Copilot]

Pull request overview

This PR addresses missing or incorrect YAML metadata descriptions across several WinForms and WPF documentation articles in the dotnet-desktop-guide area.

Changes:

• Add missing description: frontmatter to multiple articles.
• Fix incorrect frontmatter keys (descriptions:, designer:) by replacing them with description:.
• Remove an incorrect documents: frontmatter entry and consolidate that text into description:.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
dotnet-desktop-guide/wpf/graphics-multimedia/how-to-define-a-rectangle-using-a-rectanglegeometry.md	Adds a missing description entry to the frontmatter.
dotnet-desktop-guide/wpf/graphics-multimedia/how-to-define-a-pen.md	Adds a missing description entry to the frontmatter.
dotnet-desktop-guide/winforms/how-to-change-the-borders-of-windows-forms.md	Fixes an incorrect descriptions key by replacing it with description.
dotnet-desktop-guide/winforms/dialog-boxes-in-windows-forms.md	Fixes an incorrect descriptions key by replacing it with description.
dotnet-desktop-guide/winforms/controls/windows-forms-controls-by-function.md	Adds a missing description entry to the frontmatter.
dotnet-desktop-guide/winforms/controls/how-to-create-an-mdi-form-with-menu-merging-and-toolstrip-controls.md	Adds description and removes an incorrect documents frontmatter entry.
dotnet-desktop-guide/winforms/controls/how-to-add-columns-to-the-windows-forms-listview-control-using-the-designer.md	Fixes an incorrect designer key by replacing it with description.