connect_base/AvaloniaApplication5/Models/stazh.cs

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

namespace AvaloniaApplication5.Models
{
    public partial class Teacher
    {
        public string stazh
        {
            get
            {
                int yearr = 0;
                int monthr = 0;
                yearr = Convert.ToInt32(Experience) / 12;
                monthr = Convert.ToInt32(Experience) % 12;
                if (monthr > 0)
                {
                    return yearr + " года(лет) " + monthr + " месяцев(а)";

                }
                else 
                {

                return yearr + " года(лет) ";

                }


            }
        }

    }
}