public void Delete(int id)
 {
     DAL.BangCapChungChi temp = dataContext.BangCapChungChis.SingleOrDefault(t => t.ID == id);
     if (temp != null)
     {
         dataContext.BangCapChungChis.DeleteOnSubmit(temp);
         Save();
     }
 }
 public void Update(DAL.BangCapChungChi chungchi)
 {
     DAL.BangCapChungChi temp = dataContext.BangCapChungChis.SingleOrDefault(t => t.ID == chungchi.ID);
     if (temp != null)
     {
         temp.FR_KEY     = chungchi.FR_KEY;
         temp.GhiChu     = chungchi.GhiChu;
         temp.ID         = chungchi.ID;
         temp.MA_XEPLOAI = chungchi.MA_XEPLOAI;
         temp.MaChungChi = chungchi.MaChungChi;
         temp.NoiDaoTao  = chungchi.NoiDaoTao;
         temp.NgayCap    = chungchi.NgayCap;
         temp.NgayHetHan = chungchi.NgayHetHan;
         Save();
     }
 }
 public void Insert(DAL.BangCapChungChi chungchi)
 {
     dataContext.BangCapChungChis.InsertOnSubmit(chungchi);
     Save();
 }