Examples of errors detected by the V3207 diagnostic

V3207. The 'not A or B' logical pattern may not work as expected. The 'not' pattern is matched only to the first expression from the 'or' pattern.

Files

V3207 The 'not 0 or 1' logical pattern may not work as expected. The 'not' pattern is matched only to the first expression from the 'or' pattern. Files.App.Controls Omnibar.cs 149

protected void ChangeMode(OmnibarMode? oldMode, OmnibarMode newMode)
{
  ....
  var modeSeparatorWidth =
    itemCount is not 0 or 1
      ? _modesHostGrid.Children[1] is FrameworkElement frameworkElement
        ? frameworkElement.ActualWidth
        : 0
      : 0;
  ....
}