Disable NET11 VisualStylesMode for composite controls (ToolStrip, DataGridView, etc.) until NET11 layout modernization is completed

[SimonZhao888]

.NET version

.NET 11.0.0-preview.7.26381.103

Issue description

Several composite controls have not yet been fully adapted to the new .NET 11 VisualStylesMode rendering model.

Unlike standalone controls such as TextBox and ComboBox, composite controls such as ToolStrip, MenuStrip, and DataGridView still rely on legacy sizing and layout assumptions.

When VisualStylesMode.Net11 or VisualStylesMode.Latest is enabled, the new control metrics and padding can cause visual and layout regressions in these controls and their hosted child controls.

The observed issues include:

• Vertically clipped text.
• Content that is not fully visible.
• Incorrect DataGridView row-height calculations.
• Insufficient padding.
• Incorrectly rendered borders.
• Incomplete rendering of hosted editing controls such as
  ToolStripComboBox and DataGridView editing controls.

Expected behavior

Composite controls should render correctly when using VisualStylesMode.Net11, without clipped content, incorrect sizing, or layout
regressions.

Actual behavior

ToolStrip, MenuStrip, and DataGridView can render incorrectly because their layout and hosted-control implementations have not yet been modernized for the .NET 11 metrics.

Steps to reproduce

1. Create a WinForms application.
2. Set VisualStylesMode to NET11.
3. Add a ToolStripTextBox to a MenuStrip/ToolStrip.
4. Add a dataGridViewComboBox to a DataGridView.
5. Run the application.

Implementation status

• Add AppContext switches for ToolStrip, MenuStrip, and DataGridView.
• Fall back to Classic rendering by default.
• Preserve visual-style inheritance and change-notification behavior.
• Add unit tests for the default and opt-in behavior.
• Add runtime configuration documentation.
• Complete review and merge of Fix issue 15031: Disable NET11 VisualStylesMode for composite controls (ToolStrip, DataGridView, etc.) until NET11 layout modernization is completed #15033.

[KlausLoeffelmann]

• Could you please add screenshots for the individual controls
• Could you update the description in that we decided to have the quirked by the AppContext?
• And - if you got to that yet - could you also update the status, if the refactoring to quirks has been done, yet?

Thanks!