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.NET Design Patterns by Shine Xavier, Praseed Pai

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Personal income tax computation - A case study

Rather than explaining the advantages of patterns, the following example will help us to see things in action. Computation of annual income tax is a well-known problem domain across the globe. We have chosen an application domain that is well known for focusing on software development issues.

Note

The application should receive inputs regarding the demographic profile (UID, Name, Age, Sex, Location) of a citizen and the income details (Basic, DA, HRA, CESS, Deductions) to compute their tax liability. The system should have discriminants based on the demographic profile, and have a separate logic for senior citizens, juveniles, disabled people, female senior citizens, and others. By discriminant we mean ...

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