public int DeleteCarType(string type)
 {
     if (GlobalVariable.queryType == 0)
     {
         ALLCARTYPE carType = DB.ALLCARTYPES.Where(ct => ct.thisCarType.Equals(type)).SingleOrDefault();
         DB.ALLCARTYPES.Attach(carType);
         if (carType == null)
         {
             return(0);
         }
         DB.ALLCARTYPES.Remove(carType);
         DB.SaveChanges();
         return(1);
     }
     else
     {
         return(DB.DeleteCarTypeByType(type));
     }
 }