DemoexamDemo/DemoexamUser11/classes/AgentPartial.cs

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

namespace DemoexamUser11
{
    public partial class Agent
    {
        public string ImagePath { get => Logo == "" ? "/images/picture.png" : Logo; }
        public string Type { get => AgentType.Title; }
        public string SaleYear { get => ProductSale.Where(x => x.AgentID == ID && DateTime.Now.Year - x.SaleDate.Year < 2).ToList().Count.ToString() + " продаж за год"; }
        public string PriorityText { get => "Приоритетность: " + Priority; }
        public string Descount
        {
            get
            {
                List<ProductSale> productSales = ProductSale.Where(x => x.AgentID == ID).ToList();
                int summ = 0;
                int descount = 0;
                foreach (var productSale in productSales)
                {
                    summ += productSale.ProductCount;
                }
                if (summ > 10000 && summ < 50000)
                    descount = 5;
                else if (summ > 50000 && summ < 150000)
                    descount = 10;
                else if (summ > 150000 && summ < 500000)
                    descount = 20;
                else if (summ > 500000)
                    descount = 25;
                return descount.ToString();
            }
        }
    }
}