public Client(int ClientID)
{
this.clientID = ClientID;
ClientService cs=new ClientService();
DataSet ds = cs.GetClientDetailsByID(ClientID);
this.cityID = Convert.ToInt32(ds.Tables[0].Rows[0]["CityID"]);
this.email = ds.Tables[0].Rows[0]["Email"].ToString();
this.address = ds.Tables[0].Rows[0]["Address"].ToString();
this.phone = ds.Tables[0].Rows[0]["Phone"].ToString() ;
}