Solid 原則 C#（它如何為開發人員工作）

using System;
public abstract class Shape
{
    public abstract double Area();
}
class Circle : Shape
{
    public double Radius { get; set; }
    public override double Area() => Math.PI * Math.Pow(Radius, 2);
}
class Rectangle : Shape
{
    public double Width { get; set; }
    public double Height { get; set; }
    public override double Area() => Width * Height;
}
class AreaCalculator
{
    public double CalculateArea(Shape shape) => shape.Area();
}
interface ILogger 
{
    void Log(string message); // interface segregation principle d
}
class ConsoleLogger : ILogger
{
    public void Log(string message) => Console.WriteLine($"Log: {message}");
}
class FileLogger : ILogger
{
    public void Log(string message) => Console.WriteLine($"File Log: {message}");
}
class UserService
{
    private readonly ILogger logger;
    public UserService(ILogger logger) => this.logger = logger;
    public void CreateUser()
    {
        logger.Log("User created successfully");
    }
}
class EmailService
{
    private readonly ILogger logger;
    public EmailService(ILogger logger) => this.logger = logger;
    public void SendEmail()
    {
        logger.Log("Email sent successfully");
    }
}

Imports System
Public MustInherit Class Shape
	Public MustOverride Function Area() As Double
End Class
Friend Class Circle
	Inherits Shape

	Public Property Radius() As Double
	Public Overrides Function Area() As Double
		Return Math.PI * Math.Pow(Radius, 2)
	End Function
End Class
Friend Class Rectangle
	Inherits Shape

	Public Property Width() As Double
	Public Property Height() As Double
	Public Overrides Function Area() As Double
		Return Width * Height
	End Function
End Class
Friend Class AreaCalculator
	Public Function CalculateArea(ByVal shape As Shape) As Double
		Return shape.Area()
	End Function
End Class
Friend Interface ILogger
	Sub Log(ByVal message As String) ' interface segregation principle d
End Interface
Friend Class ConsoleLogger
	Implements ILogger

	Public Sub Log(ByVal message As String) Implements ILogger.Log
		Console.WriteLine($"Log: {message}")
	End Sub
End Class
Friend Class FileLogger
	Implements ILogger

	Public Sub Log(ByVal message As String) Implements ILogger.Log
		Console.WriteLine($"File Log: {message}")
	End Sub
End Class
Friend Class UserService
	Private ReadOnly logger As ILogger
	Public Sub New(ByVal logger As ILogger)
		Me.logger = logger
	End Sub
	Public Sub CreateUser()
		logger.Log("User created successfully")
	End Sub
End Class
Friend Class EmailService
	Private ReadOnly logger As ILogger
	Public Sub New(ByVal logger As ILogger)
		Me.logger = logger
	End Sub
	Public Sub SendEmail()
		logger.Log("Email sent successfully")
	End Sub
End Class

using IronPdf;
using System;
// Interface for PDF creation
public interface IPdfCreator
{
    void CreatePdf(string filePath,string content);
}
// Concrete implementation using IronPDF
public class IronPdfCreator : IPdfCreator
{    
    public void CreatePdf(string filePath,string content)
    {        // IronPDF-specific code for creating a PDF
        var renderer = new ChromePdfRenderer();
        var pdf = renderer.RenderHtmlAsPdf(content);
        pdf.SaveAs(filePath);
    }
}
// Service adhering to Single Responsibility Principle
public class PdfGenerationService
{
    private readonly IPdfCreator pdfCreator;
    public PdfGenerationService(IPdfCreator pdfCreator)
    {
        this.pdfCreator = pdfCreator;
    }
    public void GeneratePdfDocument(string filePath)
    {
        // Business logic for generating content
        string content = "<p>This PDF is generated using IronPDF and follows SOLID principles.</p>";
        // Delegate the PDF creation to the injected dependency
        pdfCreator.CreatePdf(filePath,content);
        Console.WriteLine($"PDF generated successfully at {filePath}");
    }
}
class Program
{
    static void Main()
    {
        // Dependency injection using the Dependency Inversion Principle
        IPdfCreator ironPdfCreator = new IronPdfCreator();
        PdfGenerationService pdfService = new PdfGenerationService(ironPdfCreator);
        // Generate PDF using the service
        string pdfFilePath = "output.pdf";
        pdfService.GeneratePdfDocument(pdfFilePath);
        Console.ReadLine(); // To prevent the console window from closing immediately
    }
}

Imports IronPdf
Imports System
' Interface for PDF creation
Public Interface IPdfCreator
	Sub CreatePdf(ByVal filePath As String, ByVal content As String)
End Interface
' Concrete implementation using IronPDF
Public Class IronPdfCreator
	Implements IPdfCreator

	Public Sub CreatePdf(ByVal filePath As String, ByVal content As String) Implements IPdfCreator.CreatePdf ' IronPDF-specific code for creating a PDF
		Dim renderer = New ChromePdfRenderer()
		Dim pdf = renderer.RenderHtmlAsPdf(content)
		pdf.SaveAs(filePath)
	End Sub
End Class
' Service adhering to Single Responsibility Principle
Public Class PdfGenerationService
	Private ReadOnly pdfCreator As IPdfCreator
	Public Sub New(ByVal pdfCreator As IPdfCreator)
		Me.pdfCreator = pdfCreator
	End Sub
	Public Sub GeneratePdfDocument(ByVal filePath As String)
		' Business logic for generating content
		Dim content As String = "<p>This PDF is generated using IronPDF and follows SOLID principles.</p>"
		' Delegate the PDF creation to the injected dependency
		pdfCreator.CreatePdf(filePath,content)
		Console.WriteLine($"PDF generated successfully at {filePath}")
	End Sub
End Class
Friend Class Program
	Shared Sub Main()
		' Dependency injection using the Dependency Inversion Principle
		Dim ironPdfCreator As IPdfCreator = New IronPdfCreator()
		Dim pdfService As New PdfGenerationService(ironPdfCreator)
		' Generate PDF using the service
		Dim pdfFilePath As String = "output.pdf"
		pdfService.GeneratePdfDocument(pdfFilePath)
		Console.ReadLine() ' To prevent the console window from closing immediately
	End Sub
End Class