## WPF Spell Checking fails in unexpected ways

### Scope
Edge

### Version Introduced
4.6.1

### Version Reverted
4.6.2

### Source Analyzer Status
Not planned

### Change Description

This includes a number of WPF Spell Checker issues:
- WPF Spell Checker sometimes throws <xref:System.Runtime.InteropServices.COMException?displayProperty=name>
- WPF Spell Checker fails with <xref:System.UnauthorizedAccessException> when applications are launched using 'run as different user'
- WPF Spell Checker incorrectly identifies spelling errors in compound words like 'Hausnummer' in German.

- [ ] Quirked
- [ ] Build-time break

### Recommended Action

Issue #1 - This has been fixed in .NET Framework 4.6.2
Issue #2 - WPF Spell Checker is no longer supported when applications are launched using 'run as different user'. Starting .NET Framework 4.6.2, applications launched in this manner will no longer crash unexpectedly - instead the Spell Checker will be silently disabled.
Issue #3 - This has been fixed in .NET Framework 4.6.2.

### Affected APIs
* Not detectable via API analysis

### Category
Windows Presentation Foundation (WPF)

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