/*public BillingProviderService() : this(null)
* {
*
* }*/
/*public BillingProviderService(BillingProvider provider)
* {
* _provider = provider ?? new BillingProvider();
* }*/
public void editBillingStatement(int user_id, DateTime date, double amt, string service_item)
{
_provider.addBill(user_id, date, amt, service_item);
}
public void addBill(Bill b)
{
_provider.addBill(b);
}