using System; using System.Globalization; using System.Windows.Data; namespace Examples.WPF.Converters; [ValueConversion(typeof(bool), typeof(bool))] public class NegationConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, CultureInfo culture) => value != null ? !(bool)value : false; public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) => value != null ? !(bool)value : false; }