C# Business Logic Library
Backend & Runtime / Knowledge library
.NET
Microsoft's cross-platform app framework
Why learn .NET?
Hub of the Microsoft ecosystem — expand here and you reach C#, Azure, Windows Server. Extremely fast, first-class enterprise support.
Where it came from
Started Windows-only; the .NET Core rewrite went open-source and cross-platform, unifying into one modern runtime that runs happily on Linux.
Build your understanding
Work through these exercises in order. Try the task before opening a reference.
- dotnet new a console app; explain the csproj.
- Add a NuGet package and use it.
- Build a minimal web API with 2 endpoints.
- Explain the difference: .NET Framework vs .NET 8.
- Deploy the API in a Docker container.
Documentation and sources
- Official documentation / standards body (learn.microsoft.com)
Connect the ideas
Built on
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Real World Example
Cross-Platform Inventory Synchronization for Retail Logistics
A regional logistics firm managing warehouse inventory across diverse hardware environments, including Windows-based office terminals and Linux-based edge scanners.
The business problem
The firm faces significant operational overhead due to maintaining separate codebases for their Windows-based inventory management software and their Linux-based handheld scanner applications, leading to inconsistent data synchronization and increased maintenance costs.
How this topic solves it
By utilizing the .NET cross-platform framework, the firm can unify their development efforts into a single codebase using C#. This allows the same business logic for inventory tracking to be compiled and deployed across both Windows and Linux environments, ensuring consistent data handling and reducing the surface area for bugs.
- Define core inventory data models using C# classes to ensure type safety across platforms.
- Implement shared business logic libraries that handle inventory calculations and state management.
- Utilize the .NET CLI to build and package the application for specific target runtimes including Linux and Windows.
- Deploy the compiled binaries to the respective edge scanners and office workstations.
- Validate data consistency by running automated unit tests against the shared logic library.
This diagram illustrates how shared .NET logic serves multiple hardware targets.
Office Management App
Handheld Scanner App
Centralized Data Store
- Shared Logic → compiles to → Windows Target
- Shared Logic → compiles to → Linux Target
- Windows Target → syncs → Inventory DB
- Linux Target → syncs → Inventory DB
Implementation example
This C# class defines a shared data structure that remains consistent whether the application runs on a Windows workstation or a Linux-based scanner.
public class InventoryItem { public string Id { get; set; } public int Quantity { get; set; } } // Shared model for both platformsExpected business outcome
The firm achieves a unified development lifecycle where updates to inventory logic are propagated simultaneously to all hardware endpoints, resulting in improved operational agility and reduced technical debt.
Limitations and checks
A primary limitation is the platform-specific behavior of low-level hardware APIs; while the business logic is portable, code interacting directly with scanner hardware drivers may require conditional compilation or abstraction layers, which can be verified by inspecting the build output for platform-specific warnings.