oap_labs/WpfApp1/MainWindow.xaml.cs

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 WpfApp1
{

    public class Phone
    {
        public string Name { get; set; }
        public int Price { get; set; }

        public override string ToString()
        {
            return $"Смартфон {this.Name}; цена: {this.Price}";
        }
    }
}