SOLID Principles in C#

Hands-on examples of SOLID principles using a simple shape area calculator in .NET Core. The master branch shows the code before applying the principle (the violation), and the srp branch shows the refactored version.

Single Responsibility Principle (SRP)

Before (master branch): AreaCalculator handles both area calculation AND console output — two reasons to change in one class.

After (srp branch): Calculation and output are separated into distinct responsibilities.

Running it

dotnet run

Tech

.NET Core 3.1, C# console application.