https://learn.microsoft.com/en-us/dotnet/api/system.windows.controls.itemscontrol.onkeydown?view=netframework-4.8.1&viewFallbackFrom=windowsdesktop-10.0&redirectedfrom=MSDN
ItemsControl.OnKeyDown(KeyEventArgs) Method (System.Windows.Controls) | Microsoft Learn
Invoked when the KeyDown event is received.
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