S.O.L.I.D Principles in C#: Your Roadmap to Writing Clean and Maintainable Object-Oriented Code”

Ibrahim Jaber
7 min readFeb 27, 2023

S.O.L.I.D is a set of five principles in object-oriented programming that help developers create maintainable, scalable, and extensible code. These principles are essential for building robust software applications that are easy to modify and extend over time. In this article, we’ll explore each of the S.O.L.I.D principles in detail, with examples in C#.

1. Single Responsibility Principle (SRP)

The Single Responsibility Principle states that a class should have only one reason to change. In other words, a class should have only one responsibility or job. This helps keep the code focused and easy to maintain. Here’s an example:

public class Employee {
public string Name { get; set; }
public string Address { get; set; }
public decimal Salary { get; set; }

public void Save() {
// save the employee data to the database
}

public void CalculateSalary() {
// calculate the employee's salary
}
}

In this example, the Employee class has two responsibilities: saving the employee data to the database and calculating the employee's salary. To adhere to the Single Responsibility Principle, we can split this class into two separate classes:

public class Employee {
public string Name { get; set; }
public string Address { get; set; }
}

public class EmployeeService {
public decimal CalculateSalary(Employee…

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Ibrahim Jaber

Software developer | Programming and Blockchain enthusiast