oap_labs/Model/PhoneClass.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace wpf_template.Model
{
    public class Product
    {
        public string Title { get; set; }
        public string Company { get; set; }    
        public int Price { get; set; }
        public string Category { get; set; }
        public string Photo { get; set; }
    }

    interface IDataProvider
    {
        IEnumerable<Product> GetProducts();
    }

    public class LocalDataProvider : IDataProvider
    {
        public IEnumerable<Product> GetProducts()
        {
            return new Product[]{
            new Product
            {
                Category = "Смартфон",
                Company = "Apple",
                Title = "13 Pro Max",
                Price = 84999
            },
            new Product
            {
                Category = "Смартфон",
                Company = "Samsung",
                Title = "S23",
                Price = 89999
            },
            new Product
            {
                Category = "Ноутбук",
                Company = "Xiaomi",
                Title = "RedmiBook 15",
                Price = 49999
            }
            };
        }
    }
}