public void All_Descendant_Grids_Are_Unregistered_When_Resetting_Scope()
{
var grids = new[] { new Grid(), new Grid(), new Grid() };
var scope = new Panel();
scope.Children.AddRange(grids);
var root = new TestRoot();
root.SetValue(Grid.IsSharedSizeScopeProperty, true);
root.Child = scope;
Assert.All(grids, g => Assert.True(g.HasSharedSizeScope()));
root.SetValue(Grid.IsSharedSizeScopeProperty, false);
Assert.All(grids, g => Assert.False(g.HasSharedSizeScope()));
Assert.Equal(null, root.GetValue(Grid.s_sharedSizeScopeHostProperty));
}