C# (CSharp) IMemberDal.SingleOrDefault примеры использования

Пример #1

 private void CheckIfMemberExsts(Member member)
 {
     if (_memberDal.SingleOrDefault(t => t.TcNo == member.TcNo) != null)
     {
         throw new Exception("Bu Kullanicidaha once kayit olmustur.");
     }
 }