<StackPanel xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <StackPanel.Resources> <Style TargetType="{x:Type CheckBox}"> <Setter Property="HorizontalAlignment" Value="Center" /> <Setter Property="Margin" Value="12" /> </Style> <Style TargetType="{x:Type Button}"> <Setter Property="FontSize" Value="24" /> <Setter Property="HorizontalAlignment" Value="Center" /> <Setter Property="Margin" Value="12" /> <Setter Property="IsEnabled" Value="False" /> <Style.Triggers> <MultiDataTrigger> <MultiDataTrigger.Conditions> <Condition Binding="{Binding ElementName=chkbox1, Path=IsChecked}" Value="True" /> <Condition Binding="{Binding ElementName=chkbox2, Path=IsChecked}" Value="True" /> </MultiDataTrigger.Conditions> <Setter Property="IsEnabled" Value="True" /> </MultiDataTrigger> </Style.Triggers> </Style> </StackPanel.Resources> <CheckBox Name="chkbox1"> Check 1 </CheckBox> <Button> Button Number 1 </Button> </StackPanel>