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The goal of my code was to move the existing ADO.NET (legacy) logic out to prevent any bugs (leave what has been tested and works) and make it ready for replacement (by entity framework etc). Hence didn't spend time on making ADO.NET code pretty.
Interfaced everything and made it ready for DI (Dependency Injection)
potential tasks pending:
move connectionstrings to web.config /resource files
implement dependency injection
replace ADO.NET with entity Framework
add unit tests for service layer :
public bool PlaceOrder(Order order, int customerId)