ShabaninModulekz/modulekz/PartClass.cs

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

namespace modulekz
{
    public partial class Book
    {

        public string CountStore
        {
            get
            {
                if (Store > 5)
                {
                    return "Много";
                }
                else if (Store < 1)
                {
                    return "Нет";
                }
                else
                {
                    return Store.ToString();
                }
            }
            set { }
        }


        public string CountStock
        {
            get
            {
                if (Stock > 5)
                {
                    return "Много";
                }
                else if (Stock < 1)
                {
                    return "Нет";
                }
                else
                {
                    return Stock.ToString();
                }
            }
            set { }
        }


        public int inc { get; set; } = 0;
        public double sale { get; set; }

        public string NewPrice
        {
            get
            {
                if (sale > 0) return Math.Floor(Convert.ToDouble(Cost) - Convert.ToDouble(Cost) * (sale / 100)).ToString();
                else return "";
            }
            set { }
        }
        public decimal OldPrice
        {
            get
            { return Convert.ToDecimal(Cost); }
            set { }
        }

        string d;
        public string decor
        {
            get
            {
                if (sale > 0) return d;
                else return "";
            }
            set { d = "Strikethrough"; }
        }


        public int allcount
        {
            get { return Stock + Store; }
            set { }
        }

    }
}