Button IsMouseOver
<Window x:Class="PropertyTrigger.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="PropertyTrigger" Height="300" Width="300" > <Window.Resources> <Style TargetType="{x:Type Button}"> <Style.Triggers> <Trigger Property="IsMouseOver" Value="True"> <Setter Property="Background" Value="Orange" /> </Trigger> </Style.Triggers> </Style> </Window.Resources> <Grid> <Button VerticalAlignment="Top" HorizontalAlignment="Stretch" Height="46" Name="button1" > Button </Button> </Grid> </Window>