/// <summary>
/// Default constructor.
/// </summary>
public PurchasesService()
{
this.dataAccessObject = new PurchaseDataAccessObject();
}
/// <summary>
/// Constructor with data access layer parameter.
/// </summary>
/// <param name="dataAccessObject"></param>
public PurchasesService(IPurchaseDataAccessObject dataAccessObject)
{
this.dataAccessObject = dataAccessObject;
}
