using Microsoft.UI.Xaml.Controls; using Windows.UI.Xaml.Controls.Primitives; namespace Wino.Controls { public class WinoExpander : Expander { protected override void OnApplyTemplate() { base.OnApplyTemplate(); if (GetTemplateChild("ExpanderHeader") is ToggleButton toggleButton) { toggleButton.Padding = new Windows.UI.Xaml.Thickness(0, 4, 0, 4); } } } }