using System; using System.Globalization; using System.Windows.Data; namespace ClassicAssist.UI.Misc.ValueConverters { public class DateTimeToTimeSpanValueConverter : IValueConverter { public object Convert( object value, Type targetType, object parameter, CultureInfo culture ) { return !( value is DateTime dt ) ? null : ( DateTime.Now - dt ).ToString(); } public object ConvertBack( object value, Type targetType, object parameter, CultureInfo culture ) { throw new NotImplementedException(); } } }