<Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="WPF" Height="220" Width="300"> <Window.Resources> <Style x:Key="BaseControlStyle" TargetType="{x:Type Control}"> <Setter Property="FontFamily" Value="Tahoma" /> <Setter Property="FontSize" Value="24pt"/> <Setter Property="Margin" Value="4" /> </Style> <Style TargetType="{x:Type Button}" BasedOn="{StaticResource BaseControlStyle}"> <Setter Property="FontWeight" Value="Bold" /> </Style> <Style TargetType="{x:Type CheckBox}" BasedOn="{StaticResource BaseControlStyle}"> </Style> <Style TargetType="{x:Type TextBox}" BasedOn="{StaticResource BaseControlStyle}"> </Style> </Window.Resources> <Grid> <StackPanel> <CheckBox>CheckBox</CheckBox> <TextBox>TextBox</TextBox> <Button>Button</Button> <Button FontWeight="Light">Button with overridden style</Button> <TextBlock>TextBlock</TextBlock> <ComboBox>ComboBox</ComboBox> </StackPanel> </Grid> </Window>