button background not changing wpf

<Button Name="Option1" MouseEnter="Button_MouseEnter" MouseLeave="Button_MouseLeave" Background="Transparent" BorderBrush="Transparent" Margin="0 13 0 0" Padding="5 0 5 0" HorizontalAlignment="Center" VerticalAlignment="Top">
    <Image Source="/Images/cdpr.png"></Image>
    
</Button>
<Button Name="Option2" MouseEnter="Button_MouseEnter" MouseLeave="Button_MouseLeave" Background="Transparent" BorderBrush="Transparent" Margin="0 90 0 0" Padding="5 0 5 0" HorizontalAlignment="Center" VerticalAlignment="Top">
    <Image Source="/Images/c.png"></Image>
</Button>
<Button Name="Option3" MouseEnter="Button_MouseEnter" MouseLeave="Button_MouseLeave" Background="Transparent" BorderBrush="Transparent" Grid.RowSpan="2" Margin="0 140 0 0" Padding="5 0 5 0" HorizontalAlignment="Center" VerticalAlignment="Top">
    <Image Source="/Images/w.png"></Image>
</Button>
<Button Name="Option4" MouseEnter="Button_MouseEnter" MouseLeave="Button_MouseLeave" Background="Transparent" BorderBrush="Transparent" Grid.RowSpan="2" Margin="0 190 0 0" Padding="5 0 5 0" HorizontalAlignment="Center" VerticalAlignment="Top">
    <Image Source="/Images/g.png"></Image>
</Button>

private void Button_MouseEnter(object sender, RoutedEventArgs e)
{
    if (sender is Button button)
    {
        button.Background = Brushes.Pink;

        Console.WriteLine("BUTTON ETNEENTTERR");
    }
}

private void Button_MouseLeave(object sender, RoutedEventArgs e)
{
    if (sender is Button button)
    {
        button.Background = Brushes.Transparent;
    }
}