can not implicitly type int to string

public class HomeController : Controller
    {
        TestEntities t = new TestEntities();
        //
        // GET: /Home/
        public ActionResult Index()
        {
            var model = new emp();

            var countryList = t.Prabs.ToList();
            foreach (var country in countryList)
            {
                model.CountryList.Add(new SelectListItem()
                {
                    Text = country.Name,
                    Value = country.ID.ToString(),
                });

            }


            return View(model);
        }
        [HttpPost]
        public ActionResult save(emp model)
        {
            if (ModelState.IsValid)
            {
                var m = new Rahul();
                m.CountryID = model.counid; // here i got error like cannot implicitly convert type int to string
                m.DOB = model.DOB;
                t.Rahuls.Add(m);
                t.SaveChanges();
            }
            return View("Index",model);

        }

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web.Mvc;
using System.ComponentModel.DataAnnotations;


namespace WebApplication18.Models
{
    public class emp
    {

        public emp() {
        CountryList = new List<SelectListItem>();
    }
       
        public int id { get; set; }
        public IList<SelectListItem> CountryList { get; set; }   
        public int counid { get; set; }

   
        [DataType(DataType.Date)]
        public DateTime DOB { get; set; }
    }
}