oap_labs/WpfApp1/model/Class1.cs

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

namespace WpfApp1.model
{
    public class Client
    {
        public string Name { get; set; }
        public int Age { get; set; }
        public int Price { get; set; }
        public string Place { get; set; }
        public string Category { get; set; }
        public List<ClientPrice> ClientPriceList { get; set; }
        public List<ClientCategory> ClientCategoryList { get; set; }
    }
}