c#3_13.cs

<Style TargetType="Button" x:Key="CellStyle">
        
    <Setter Property="BorderThickness" Value="2"/>
    <Setter Property="BorderBrush" Value="DarkGray" />
    <Setter Property="FontSize" Value="65" />
            
    <Style.Triggers>
        <DataTrigger Binding="{Binding GameActive}" Value="True">
            <Setter Property="Background" Value="White"/>
            <Setter Property="IsEnabled" Value="True"/>
        </DataTrigger>
        <DataTrigger Binding="{Binding GameActive}" Value="False">
            <Setter Property="Background" Value="LightGray"/>
            <Setter Property="IsEnabled" Value="False"/>
            <Setter Property="Foreground" Value="Black"/>
        </DataTrigger>
    </Style.Triggers>
    
</Style>