Bool to Visibility converters

BoolToInvisibilityConverter

   public class BoolToInvisibilityConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            bool isInvisible = (bool)value;

            if (BoolToVisibilityConverter.IsVisibilityInverted(parameter))
                isInvisible = !isInvisible;

            return (isInvisible ? Visibility.Collapsed : Visibility.Visible);
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            bool isInvisible = ((Visibility)value == Visibility.Collapsed);

            if (BoolToVisibilityConverter.IsVisibilityInverted(parameter))
                isInvisible = !isInvisible;

            return isInvisible;
        }
    }

BoolToVisibilityConverter

    public class BoolToVisibilityConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            bool isVisible = (bool)value;
             
            if (IsVisibilityInverted(parameter))
                isVisible = !isVisible;
  
            return (isVisible ? Visibility.Visible : Visibility.Collapsed);
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            bool isVisible = ((Visibility)value == Visibility.Visible);

            if (IsVisibilityInverted(parameter))
                isVisible = !isVisible;

            return isVisible;
        }

        internal static bool IsVisibilityInverted(object parameter)
        {
            return (GetVisibilityMode(parameter) == Visibility.Collapsed);
        }

        internal static Visibility GetVisibilityMode(object parameter)
        {
            Visibility mode = Visibility.Visible;

            if (parameter != null)
            {
                if (parameter is Visibility)
                {
                    mode = (Visibility)parameter;
                }
                else
                {
                    try
                    {
                        mode = (Visibility)Enum.Parse(typeof(Visibility), parameter.ToString(), true);
                    }
                    catch (FormatException ex)
                    {
                        throw new FormatException("Invalid Visibility specified as the ConverterParameter. Use Visible or Collapsed.", ex);
                    }
                }
            }
            return mode;
        }


    }

via http://jeffhandley.com/archive/2008/10/27/binding-converters---visibilityconverter.aspx