using System; using System.Globalization; using System.Windows; using System.Windows.Data; namespace ChatController.Converter { public class OwnChatNullVisibilityConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { return value is null ? Visibility.Collapsed : Visibility.Visible; } public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { throw new NotImplementedException(); } } }