Fix Expander HeaderTemplate for Simple Theme
@ -101,6 +101,7 @@
Grid.Column="1"
Background="Transparent"
Content="{TemplateBinding Content}"
ContentTemplate="{Binding $parent[Expander].HeaderTemplate}"
VerticalAlignment="Center"
HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"