UnitToolkit

A small multi-tool study app in C# with two UIs:

• Console CLI (text menu)
• Avalonia Desktop (5 tabs)

All domain logic lives in UnitToolkit.Core and is reused by both UIs (DRY).

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Features (5 tools)

1. Units Converter — convert:
   • Temperature: C ↔ F ↔ K
   • Length: m ↔ cm ↔ km
   • Mass: kg ↔ g ↔ lb
2. Currency Calculator — amount × rate (rate is entered manually, no network).
3. Password / Random
   • Password generator (cryptographically strong RNG), options: uppercase, digits, symbols, length.
   • Random integer in a range (cryptographically strong).
4. BMI Calculator
   • Height in meters (e.g., 1.70) or centimeters (e.g., 170), weight in kg.
   • Returns BMI value, WHO category, and a short advice.
5. Data Size Converter
   • SI: B, KB, MB, GB, TB (10^3)
   • IEC: KiB, MiB, GiB, TiB (2^10)

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Architecture

UnitToolkit/
├─ UnitToolkit.sln
├─ README.md
├─ .gitignore
├─ src/
│  ├─ UnitToolkit.Core/                 # Domain logic (no UI)
│  │  ├─ UnitToolkit.Core.csproj
│  │  └─ Services/
│  │     ├─ UnitConverter.cs
│  │     ├─ CurrencyCalculator.cs
│  │     ├─ PasswordGenerator.cs
│  │     ├─ BmiCalculator.cs
│  │     └─ DataSizeConverter.cs
│  ├─ UnitToolkit.Cli/                  # Console UI
│  │  ├─ UnitToolkit.Cli.csproj
│  │  ├─ Common/
│  │  │  └─ Input.cs
│  │  └─ Program.cs
│  └─ UnitToolkit.Desktop/              # Avalonia Desktop UI
│     ├─ UnitToolkit.Desktop.csproj
│     ├─ App.axaml
│     ├─ App.axaml.cs
│     └─ Views/
│        ├─ MainWindow.axaml            # 5 tabs (Units, Currency, Password/Random, BMI, Data Size)
│        └─ MainWindow.axaml.cs         # thin handlers calling Core services
└─ tests/
   └─ UnitToolkit.Tests/                # xUnit tests for all 5 services
      ├─ UnitToolkit.Tests.csproj
      ├─ UnitConverterTests.cs
      ├─ CurrencyCalculatorTests.cs
      ├─ PasswordGeneratorTests.cs
      ├─ BmiCalculatorTests.cs
      └─ DataSizeConverterTests.cs

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Requirements

• .NET SDK 9 (includes runtime 9)
• macOS / Windows / Linux (Avalonia is cross-platform)
• Optional: JetBrains Rider (Avalonia plugin recommended)

Check versions:

dotnet --info

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Build & Run

Build everything

dotnet build

Run CLI

dotnet run --project src/UnitToolkit.Cli

Run Desktop (Avalonia)

dotnet run --project src/UnitToolkit.Desktop

Tests

dotnet test