DiscordChatExporter/DiscordChatExporter.Gui/Converters/InverseBoolConverter.cs

using System;
using System.Globalization;
using System.Windows.Data;

namespace DiscordChatExporter.Gui.Converters
{
    [ValueConversion(typeof(bool), typeof(bool))]
    public class InverseBoolConverter : IValueConverter
    {
        public static InverseBoolConverter Instance { get; } = new();

        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is bool boolValue)
                return !boolValue;

            return default(bool);
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is bool boolValue)
                return !boolValue;

            return default(bool);
        }
    }
}