using System.Globalization; using System.Windows; using System.Windows.Data; namespace Sms.TaskTwo.Wpf.Converters; public sealed class StringNotEmptyToVisibilityConverter : IValueConverter { public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture) => value is string text && !string.IsNullOrEmpty(text) ? Visibility.Visible : Visibility.Collapsed; public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture) => throw new NotSupportedException(); }