Abstracts data access. It allows you to swap a SQL Server implementation for a Mock version during unit testing, facilitating Test-Driven Development (TDD) .
make adhering to the Dependency Inversion principle a default behavior rather than an afterthought. Agile principles, patterns, and practices in C#...
Used for decoupled communication. C# Events and Delegates are the native way to implement this, allowing systems to react to changes without being tightly coupled. Abstracts data access
Create specific interfaces rather than one general-purpose interface. IFileReader and IFileWriter are better than one IFileProcessor . Agile principles, patterns, and practices in C#...