using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Data; namespace StyletBasicNavigation.Converters { [ValueConversion(typeof(bool), typeof(bool))] public class InverseBooleanConverter : IValueConverter { #region IValueConverter Members public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { //if (targetType != typeof(bool)) // throw new InvalidOperationException("The target must be a boolean"); return !(bool)value; } public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { //throw new NotSupportedException(); return true; } #endregion } }