Object-Oriented Programming Best Practices

When writing object-oriented code in C#, it's important to follow best practices to ensure clean and maintainable code. Here are some guidelines to consider:

1. Single Responsibility Principle (SRP): Each class should have a single responsibility or purpose. This makes the code easier to understand, test, and maintain.

2. Open-Closed Principle (OCP): Classes should be open for extension but closed for modification. This means that new functionality can be added without modifying existing code.

3. Liskov Substitution Principle (LSP): Subtypes must be substitutable for their base types. This allows polymorphism and ensures that derived classes can be used interchangeably with their base classes.

4. Interface Segregation Principle (ISP): Clients should not be forced to depend on interfaces they do not use. Interfaces should be specific to the client's needs to avoid unnecessary dependencies.

5. Dependency Inversion Principle (DIP): High-level modules should not depend on low-level modules. Both should depend on abstractions. This promotes loose coupling and allows for easier maintenance and testing.

These principles help in writing code that is flexible, maintainable, and easy to understand. The following code snippet demonstrates some of these principles:

1public class Employee
2{
3    // Properties for Employee class
4    public string FirstName { get; set; }
5    public string LastName { get; set; }
6    public string Department { get; set; }
7    public decimal Salary { get; set; }
8
9    // Constructor for Employee class
10    public Employee(string firstName, string lastName, string department, decimal salary)
11    {
12        FirstName = firstName;
13        LastName = lastName;
14        Department = department;
15        Salary = salary;
16    }
17
18    // Method to display information about the employee
19    public void DisplayInfo()
20    {
21        Console.WriteLine($"Name: {FirstName} {LastName}");
22        Console.WriteLine($"Department: {Department}");
23        Console.WriteLine($"Salary: {Salary}");
24    }
25}
26
27public class Program
28{
29    public static void Main()
30    {
31        Employee employee = new Employee("John", "Doe", "Human Resources", 5000);
32        employee.DisplayInfo();
33    }
34}

In this code, the Employee class follows the single responsibility principle by encapsulating data and behavior related to an employee. The DisplayInfo() method displays information about the employee. This code also demonstrates the use of constructors to initialize the object and the display of employee information using the Console.WriteLine() method.

By following these best practices, you can create maintainable and efficient object-oriented code in C#.

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}

using System;

​

public class Employee

{

    public string FirstName { get; set; }

    public string LastName { get; set; }

    public string Department { get; set; }

    public decimal Salary { get; set; }

​

    public Employee(string firstName, string lastName, string department, decimal salary)

    {

        FirstName = firstName;

        LastName = lastName;

        Department = department;

        Salary = salary;

    }

​

    public void DisplayInfo()

    {

        Console.WriteLine($"Name: {FirstName} {LastName}");

        Console.WriteLine($"Department: {Department}");

        Console.WriteLine($"Salary: {Salary}");

    }

}

​

public class Program

{

    public static void Main()

    {