Linq query to join multiple tables from database in ASP.Net

Hi everyone,

I am trying joining multiple tables on multiple checkbox checked.

My tables structure like picture.

I have table name "T_Talepler"

I have different 3 table "T_Klas", "T_Konaklama", "T_IL"

This 3 table foreign key T_Talepler.

How can I join linq to sql.

Code

           var ids = new List<int>();
           IQueryable<T_Talepler> rows = null;
 
           if (!string.IsNullOrEmpty(klasId))
           {
               for (int i = 0; i < klasId.Split(',').Length; i++)
               {
                   ids.Add(Convert.ToInt32(klasId.Split(',')[i]));
               }
 
 
                   rows = (from v in shy.T_Talepler
                   join c in shy.T_Klas on v.KlasID equals c.ID
                   join b in shy.T_Konaklama on v.KonaklamaID equals b.ID
                   join p in shy.T_IL on v.ILID equals p.ID
                   where 
           }
           else
           {
               rows = shy.T_Talepler.Take(5);
           }
 
           var talep = rows.Select(a => new
           {
               Butce = a.Butce,
               Donus = a.DonusTarihi,
               Gidis = a.GidisTarihi,
               Il = a.T_IL.ILAd,
               Ilce = a.T_ILCE.ILceAd,
               Kisi = a.KisiSayisi,
               Klas = a.T_Klas.UcretTipi,
               Talep = a.TalepNo,
               Konaklama = a.T_Konaklama.KonaklamaGece,
               Konfor = a.T_Konaklama.Konfor,
               TTarih = a.TalepTarihi,
               Sirket = a.T_Sirket.SirketLogo,
               YetkiliAd = a.T_Sirket.YetkiliAd,
               klasId = a.KlasID
           }).ToList();