var customers = from c in casino.Customers
                join p in casino.Persons on c.Person_id equals p.Person_id
                join ph in casino.Photos on p.Person_id equals ph.Person_id into temp
                from t in temp.DefaultIfEmpty()
                where p.Name == this.nameText.Text
                select new
                {            Surname = p.Surname, 
                             Name = p.Name,
                             Second_name = p.Second_name,
                             Birthday = p.Birthday,
                };
      searchGrid.DataSource = customers;