VisibilityConverter : IValueConverter

class BoolToVisibilityConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if ((bool)value)
                return Visibility.Visible;
            else
                return Visibility.Hidden;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if ((Visibility)value == Visibility.Hidden)
                return true;
            else
            {
                return false;
            }
        }
    }