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Explain SOLID Principles?
The SOLID principles are five design principles that improve software maintainability, scalability, and readability. These principles help in building robust ASP.NET Core applications by promoting separation of concerns, modularity, and flexibility.
1. S - Single Responsibility Principle (SRP)
Definition: A class should do one thing and therefore it should have only a single reason to change.
Example:
Here, ReportGenerator handles report generation, and ReportSaver is responsible for saving the report. This follows SRP by separating concerns.
2. O - Open/Closed Principle (OCP)
Definition: A class should be open for extension but closed for modification.You can add new features without changing existing code.
Example:
3. L - Liskov Substitution Principle (LSP)
Definition: Derived or child classes must be substitutable for their base or parent classes.
Example:
4. I - Interface Segregation Principle (ISP)
Definition: Classes should not be forced to implement a function they do not need.
Example:
InStoreOrder doesn't need IOnlinePayment, preventing unnecessary dependencies.
5. D - Dependency Inversion Principle (DIP)
Definition: High-level classes should not depend on low-level classes . Both should depend on abstractions.
Example:
OrderService depends on INotificationService, allowing for flexibility (e.g., switching from email to SMS notifications).
Implementing SOLID in ASP.NET Core
ASP.NET Core encourages SOLID principles by using Dependency Injection (DI), Middleware, Repository Pattern, and Service Layers.
Example: Applying SOLID in ASP.NET Core
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About Author
Brijesh Kumar
Database Developer
I have more then 6 years Experience in Microsoft Technologies - SQL Server Database, ETL
Azure Cloud - Azure SQL Database, CosmosDB, Azure Data Factory, PowerBI, Web Job, Azure Function, Azure Storage, Web Apps, Powershall
and Database Migration On-Premise to Azure Cloud.
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