How would you design a plugin architecture with SOLID principles?

• Define plugin contracts with interfaces (DIP).
• Load plugins dynamically using reflection or MEF.
• Use DI to inject dependencies into plugins.
• Ensure plugins follow SRP with focused responsibilities.
• Use Factory or Strategy patterns to instantiate plugins.
• Keep core system closed for modification but open for extension (OCP).
• Separate cross-cutting concerns externally.

Practical .NET Questions