private static void ObjectCastTest()
{
object rInfor = null;
RInfor infor = rInfor as RInfor;
Console.WriteLine(infor == null);
}
private static void AddRInfor(RInfor rInfor, string connString)
{
DBCTXTContext dbc = new DBCTXTContext(connString);
dbc.RentInfors.Add(rInfor);
dbc.SaveChanges();
}
