C# 陣列長度（對於開發者的運行原理）

int[] numbers = { 1, 2, 3, 4, 5 };
int arrayLength = numbers.Length; // arrayLength will be 5

Dim numbers() As Integer = { 1, 2, 3, 4, 5 }
Dim arrayLength As Integer = numbers.Length ' arrayLength will be 5

int[] numbers = { 1, 2, 3, 4, 5 };
int arrayLength = 0;
foreach (var item in numbers)
{
    arrayLength++;
}
// arrayLength will be 5

Dim numbers() As Integer = { 1, 2, 3, 4, 5 }
Dim arrayLength As Integer = 0
For Each item In numbers
	arrayLength += 1
Next item
' arrayLength will be 5

int[] numbers = { 1, 2, 3, 4, 5 };
// Incorrect usage leading to IndexOutOfRangeException
// int value = numbers[10]; // Avoid accessing elements beyond the array length

Dim numbers() As Integer = { 1, 2, 3, 4, 5 }
' Incorrect usage leading to IndexOutOfRangeException
' int value = numbers[10]; // Avoid accessing elements beyond the array length

List<int> dynamicList = new List<int>();
dynamicList.Add(1);
dynamicList.Add(2);
// No fixed length; the list can dynamically grow

Dim dynamicList As New List(Of Integer)()
dynamicList.Add(1)
dynamicList.Add(2)
' No fixed length; the list can dynamically grow

using IronPdf;
using System;
using System.Linq;

class Program
{
    public static void Main()
    {
        // PDF files to open
        string[] pdfFiles = { "GeneratedPDF_1.pdf", "GeneratedPDF_2.pdf", "GeneratedPDF_3.pdf" };
        PdfDocument[] pdfArray = new PdfDocument[pdfFiles.Length];

        // Counter to keep track of the index
        int index = 0;

        // Loop to open each PDF and extract information
        foreach (string pdfFile in pdfFiles)
        {
            // Load PDF document
            var pdfDocument = PdfDocument.FromFile(pdfFile);
            pdfArray[index++] = pdfDocument; // Add document to array, increment index
        }

        int arrayLength = pdfArray.Length;
        Console.WriteLine("PDF array Length: " + arrayLength);
    }
}

Imports IronPdf
Imports System
Imports System.Linq

Friend Class Program
	Public Shared Sub Main()
		' PDF files to open
		Dim pdfFiles() As String = { "GeneratedPDF_1.pdf", "GeneratedPDF_2.pdf", "GeneratedPDF_3.pdf" }
		Dim pdfArray(pdfFiles.Length - 1) As PdfDocument

		' Counter to keep track of the index
		Dim index As Integer = 0

		' Loop to open each PDF and extract information
		For Each pdfFile As String In pdfFiles
			' Load PDF document
			Dim pdfDocument = PdfDocument.FromFile(pdfFile)
'INSTANT VB WARNING: An assignment within expression was extracted from the following statement:
'ORIGINAL LINE: pdfArray[index++] = pdfDocument;
			pdfArray(index) = pdfDocument ' Add document to array, increment index
			index += 1
		Next pdfFile

		Dim arrayLength As Integer = pdfArray.Length
		Console.WriteLine("PDF array Length: " & arrayLength)
	End Sub
End Class