oap_labs/Class1.cs

using System.Globalization;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;


namespace WpfApp4
{

    public class DateTimeToDateConverter : IValueConverter
    {
        public object Convert(
            object value,
            Type targetType,
            object parameter,
            CultureInfo culture)
        {
            return ((DateTime)value).ToString("dd.MM.yyyy");
        }

        public object ConvertBack(
            object value,
            Type targetType,
            object parameter,
            CultureInfo culture)
        {
            return DependencyProperty.UnsetValue;
        }
    }
    class Phone
    {
        public string Title { get; set; }
        public string Company { get; set; }
        public int Price { get; set; }
    }

}