WPF

public MainWindowViewModel()
{
    try
    {
        Action<object> action = handleTask;

        var fb = new FacebookClient(FACEBOOK_ID, FACEBOK_SECRET);

        var task = fb.GetTaskAsync("4");

        task.ContinueWith(action);
    }
    catch (FacebookApiException ex)
    {
        throw ex;
    }
}

private void handleTask(object data)
{
}

Hello,

I have a button which has 2 labels. I want the labels foreground to be black on mouse over button and white when mouse is not over button.

I used this :

<Style TargetType="{x:Type Label}" >
            <Style.Triggers>
                <Trigger Property="IsMouseOver" Value="true">
                    <Setter Property="Foreground" Value="Black"/>
                </Trigger>
                <Trigger Property="IsMouseOver" Value="false">
                    <Setter Property="Foreground" Value="White"/>
                </Trigger>
            </Style.Triggers>
        </Style>
But the thing is that label foreground is changed only when i am over the label. so one label is black and second is white.

How can i solve this so when mouse is over the button, it's children labels will use this style?