Ignore an Implicit Style by setting Style to Null
<Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:WpfApplication1="clr-namespace:WpfApplication1;assembly=" Title="WPF" Height="88" Width="180"> <Window.Resources> <Style TargetType="{x:Type Button}"> <Setter Property="Background" Value="LightGray"/> <Setter Property="FontWeight" Value="Bold"/> </Style> </Window.Resources> <StackPanel Margin="4"> <Button>Implicit Style</Button> <Button Style="{x:Null}">Ignores Style</Button> </StackPanel> </Window>