How to get element properties?

Question

WPF

Good afternoon everyone. Help me please. When accessing ListCheckBox.Children (ListCheckBox is

<StackPanel x:Name="ListCheckBox" Margin="0" Width="284">

), then I only get the properties of the UI, but how do I get the properties of the element?
In this example, when accessing ListCheckBox.Children[0], the IsChecked property is not visible, as it returns a UIElementCollection of the child elements of this Panel:

<StackPanel x:Name="ListCheckBox" Margin="0" Width="284">
                        <CheckBox x:Name="All" Content="Выбрать все" HorizontalAlignment="Left"  VerticalAlignment="Top" Margin="1,1,1,5" IsChecked="True"/>
  </StackPanel>

Answer 1

I figured out how to do it)

foreach (object child in ListCheckBox.Children)
            {
                var element = child as CheckBox;
                if (!element.Name.Equals("All"))
                    element.IsChecked = All.IsChecked;
            }