or
<Style TargetType="telerik:RadComboBox" BasedOn="{StaticResource RadComboBoxStyle}"> <Setter Property="Padding" Value="5" /></Style><telerik:PropertyDefinition Binding="{Binding Path=Host,Mode=TwoWay}" GroupName="dbSquidPorperties" DisplayName="{DynamicResource IP}" IsReadOnly="{Binding DataContext.DbIsReadOnly,RelativeSource={RelativeSource AncestorType={x:Type UserControl}}}" OrderIndex="0"/><Style x:Key="ContainerStyle" TargetType="telerik:RadTreeViewItem"> <Style.Setters> <!--<Setter Property="ExpanderStyle" Value="{Binding MyCustomExpanderStyle, Mode=TwoWay}"/>--> <Setter Property="ExpanderStyle" Value="{StaticResource ExpanderStyle_3}" /> </Style.Setters></Style>