devskill/aspnetb7-at4

1. Top-level shape

- This repository is a .NET/C# solution (AdmissionTest4.sln) organized as a set of four independent task projects plus a separate Tests subtree.

- The README is minimal, so the structure itself is the main architectural signal: this is a multi-project exercise repo, not a single unified application.

2. Solution boundary

- AdmissionTest4/Task1 through AdmissionTest4/Task4 each look like a small standalone console-style project with its own Program.cs and .csproj.

- There is no shared application/library project in the tree, which suggests the tasks are intentionally isolated rather than layered into a common domain/service architecture.

3. Task 1: word counting

- Task1 contains WordCounter.cs plus Program.cs.

- The likely flow is: input text is handled by the entrypoint, passed to WordCounter, and results are produced back to the console or caller.

- This task is a small single-responsibility utility app centered on text analysis.

4. Task 2: domain objects + data operations

- Task2 includes Customer.cs, Purchase.cs, DataOperation.cs, and Program.cs.

- The presence of two entity-like classes (Customer, Purchase) plus a dedicated operation class suggests a small domain model with a separate processing layer.

- DataOperation is the main boundary for business logic: it likely coordinates customers and purchases, computes derived results, or performs CRUD-style manipulation in memory.

5. Task 2 architectural pattern

- Compared with Task 1, Task 2 is more structured: it separates data representation from operations.

- That makes it the closest thing in the repo to a layered design: Program as orchestration, model classes as data, DataOperation as processing logic.

6. Task 3: file-based processing

- Task3 contains FileUtility.cs, Data.txt, and Program.cs.

- This task clearly introduces a filesystem boundary: the app reads or processes the bundled text file rather than only in-memory inputs.

- FileUtility is the abstraction around file I/O, while Data.txt is test/sample input packaged with the project.

7. Task 3 data flow

- The likely flow is: Program invokes FileUtility, which accesses Data.txt, then returns content for further processing or display.

- This is the only task with an explicit external artifact in the tree, so for an architecture diagram it should be shown as the file-system integration point.

8. Task 4: format validation

- Task4 contains FormatChecker.cs and Program.cs.

- This suggests a focused utility for string/format validation or normalization, with the checker class encapsulating the core rules.

- As with the other tasks, Program acts as the thin orchestration layer.

9. Tests subsystem

- The Tests folder contains separate test projects for Task1, Task2, and Task4.

- The structure implies each task is tested independently, reinforcing the repo’s vertical-slice / per-task organization.

- There is no test project for Task3, which may indicate either manual verification or an exercise that was not unit-tested.

10. Dependency pattern

- The repo appears to follow a simple pattern everywhere: Program.cs → task-specific helper/class → output.

- Most logic is concentrated in a single class per task, which keeps dependencies shallow and makes each project easy to diagram as a small self-contained module.

11. Operational and tooling context

- The repo is built around .csproj projects and a Visual Studio/.NET solution file, so the key runtime is the .NET runtime.

- There are no signs of web hosting, databases, message brokers, or cloud infrastructure; the architecture is primarily local computation + console I/O + file I/O.

12. How to draw it

- A good architecture diagram would show:

- one solution container

- four independent task projects

- a tests boundary connected to Task1, Task2, and Task4

- a filesystem artifact (Data.txt) connected only to Task3

- Avoid depicting cross-task dependencies; the tree suggests the tasks are intentionally isolated.