Fixing memory leaks of DataGridView elements accessible objects

[vladimir-krestov]

Fixes #7347 ⚠️Should be merged after #7319 because uses the ComboBox leaks fix. ⚠️Doesn't fix memory leaks of TextPattern. It will be fixed as another fix for TextBox as well.

Proposed changes

• Add a call of UiaDisconnectProvider for DataGridView elements (rows, cells, headers) for cases when: DataGridView is destroyed A row is removed from a DataGridView A column is removed from a DataGridView Using TextPattern explorer of Inspect, Narrator

Customer Impact

• Less memory leaks of DataGridView

Regression?

• No

Risk

• Minimal

Screenshots

Before

• There are some kept object in the memory after disposing a DataGridView:

After

• These are no DataGridView elements objects in the memory after disposing (without TextPattern):

Test methodology

• CTI
• Manually (via WinDbg)

Accessibility testing

• Using AI, Inspect, Narrator

Test environment(s)

• .NET 7.0 Preview 4
• Windows 11

Microsoft Reviewers: Open in CodeFlow