AvaloniaTeachersBase/AvaloniaBaseTeacher/Models/FIO, Phone and Experience.cs

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

namespace AvaloniaBaseTeacher.Models
{
    public partial class Teacher
    {
        public string FIO
        {
            get
            {
                return Surname + " " + Name + " " + Patronymic;
            }
        }

        public string Exp
        {
            get
            {
                long? month = Experience % 12;
                long? year = (Experience - month) / 12;
                if (year == 0)
                {
                    return $"{month} {(month == 1 ? "месяц" : (month >= 2 && month <= 4 ? "месяца" : "месяцев"))}";
                }
                else if (month == 0)
                {
                    return $"{year} {(year % 10 == 1 && year % 100 != 11 ? "год" : (year % 10 >= 2 && year % 10 <= 4 && (year % 100 < 10 || year % 100 >= 20) ? "года" : "лет"))}";
                }
                else
                {
                    return $"{year} {(year % 10 == 1 && year % 100 != 11 ? "год" : (year % 10 >= 2 && year % 10 <= 4 && (year % 100 < 10 || year % 100 >= 20) ? "года" : "лет"))} " +
                           $"{month} {(month == 1 ? "месяц" : (month >= 2 && month <= 4 ? "месяца" : "месяцев"))}";
                }
            }
        }

        public string Phonee
        {
            get
            {
                if (Phone == "")
                {
                    return "не указан";
                }
                else
                {
                    return Phone;
                }
            }
        }
    }
}