lab1/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 Guitar
    {
        public string Brand { get; set; }
        public string Model { get; set; }
        public string Color { get; set; }
    }
    
}