CustomerBizObj oCustomer = new CustomerBizObj(); DataSet dsCustomers = oCustomer.GetMyCustomersDS(); or int custID = 456; oCustomer.GetCustomerEntityByPK(456) Then you could access the columns in the current entity with string CustName = oCustomer.Entity.CustomerName;The examples in the DevGuide are based on using either Webforms, WinForms, etc. base classes in MM that are aware of the business objects when you register them. In a console app you don't have that luxury so you just create the objects as needed and use the methods on them.