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Plugin Architecture in C#

Design and implementation of a flexible plugin architecture for extensible .NET applications.

  • C#
  • .NET
  • Reflection
  • MEF
  • Dependency Injection

The Challenge

Monolithic applications quickly reach their limits when functionality needs to be dynamically extended or customized by third parties. The requirement was an architecture that allows features to be developed as standalone plugins without modifying the application core.

The Solution

Development of a robust plugin architecture based on proven .NET patterns and the Managed Extensibility Framework (MEF).

Architecture Highlights

  • Plugin Contracts: Definition of interfaces as contracts that all plugins must implement.
  • Dynamic Assembly Loading: Loading plugin DLLs at runtime using Reflection.
  • MEF Integration: Declarative component management with [Export] and [Import] attributes.
  • Exception Isolation: Faulty plugins cannot crash the host application.
  • Plugin SDK: NuGet package with all necessary interfaces for plugin developers.

The Result

A flexible architecture that enables developing new functionality as plugins without modifying the application core.