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Enterprise License Management System

Desktop application with hardware integration

C# Windows Desktop Completed Enterprise

Project Overview

A comprehensive Windows Forms application for managing software licenses across enterprise environments. Built with Domain-Driven Design principles, the system handles license generation using MD5-based serial number matching, Excel import workflows for bulk operations, and SQLite for lightweight local storage.

The application follows Clean Architecture with clear separation between the Domain, Application, Infrastructure, and Presentation layers.

Architecture & Design Patterns

Aggregate Root (License)
License entity serves as the aggregate root managing serial keys and activation states
Value Objects
SerialNumber and LicenseKey implemented as immutable value objects
Repository Pattern
Data access abstracted through ILicenseRepository interface
Factory Pattern
LicenseFactory creates license instances with proper validation
Clean Architecture
Four-layer separation: Domain → Application → Infrastructure → Presentation
SOLID Principles
Single Responsibility, Open/Closed, Dependency Inversion throughout

Key Features

Bulk Excel Import

Import thousands of license records from Excel with validation

MD5 Serial Matching

Secure hardware-based license validation using MD5 hash matching

Audit Trail

Complete logging of all license operations for compliance

Offline Operation

SQLite enables full functionality without network connectivity

Tech Stack

C# (.NET 6) Windows Forms SQLite (3.x) EPPlus (6.x) NUnit (3.x)

Project Info

LanguageC#
PlatformWindows Desktop
TypeEnterprise
StatusCompleted
Views9