C# 新手指南（开发人员如何使用）

public class Book {
    public string Title { get; set; }
    public Book(string title) {
        Title = title;
    }
}
Book book = new Book("The C# Programming Language");

Public Class Book
	Public Property Title() As String
	Public Sub New(ByVal title As String)
		Me.Title = title
	End Sub
End Class
Private book As New Book("The C# Programming Language")

public class ExampleClass {
    // Parameterless constructor
    public ExampleClass() {
        // Initialization code here
    }
}

Public Class ExampleClass
	' Parameterless constructor
	Public Sub New()
		' Initialization code here
	End Sub
End Class

// Single-dimensional array
int [] numbers = new int [5]; // Initializes an array for 5 integers
// Multidimensional array
int [,] matrix = new int [3, 2]; // A 3x2 matrix
// Jagged array (an array of arrays)
int [][] jaggedArray = new int [3][];
jaggedArray [0] = new int [4]; // First row has 4 columns
jaggedArray [1] = new int [5]; // Second row has 5 columns
jaggedArray [2] = new int [3]; // Third row has 3 columns

' Single-dimensional array
Dim numbers(4) As Integer ' Initializes an array for 5 integers
' Multidimensional array
Dim matrix(2, 1) As Integer ' A 3x2 matrix
' Jagged array (an array of arrays)
Dim jaggedArray(2)() As Integer
jaggedArray (0) = New Integer (3){} ' First row has 4 columns
jaggedArray (1) = New Integer (4){} ' Second row has 5 columns
jaggedArray (2) = New Integer (2){} ' Third row has 3 columns

var person = new { Name = "Alice", Age = 30 };
Console.WriteLine($"Name: {person.Name}, Age: {person.Age}");
// In LINQ
var results = from p in people
              select new { p.Name, p.Age };

Dim person = New With {
	Key .Name = "Alice",
	Key .Age = 30
}
Console.WriteLine($"Name: {person.Name}, Age: {person.Age}")
' In LINQ
Dim results = From p In people
	Select New With {
		Key p.Name,
		Key p.Age
	}

public class Rectangle {
    public int Width { get; set; }
    public int Height { get; set; }
    public Point Location { get; set; }
}
Rectangle rect = new Rectangle {
    Width = 100,
    Height = 50,
    Location = new Point { X = 0, Y = 0 }
};

Public Class Rectangle
	Public Property Width() As Integer
	Public Property Height() As Integer
	Public Property Location() As Point
End Class
Private rect As New Rectangle With {
	.Width = 100,
	.Height = 50,
	.Location = New Point With {
		.X = 0,
		.Y = 0
	}
}

public void PerformOperation() {
    int LocalFunction(int x) {
        return x * x;
    }
    Console.WriteLine(LocalFunction(5)); // Output: 25
}

Public Sub PerformOperation()
'INSTANT VB TODO TASK: Local functions are not converted by Instant VB:
'	int LocalFunction(int x)
'	{
'		Return x * x;
'	}
	Console.WriteLine(LocalFunction(5)) ' Output: 25
End Sub

Func<int, int> square = x => x * x;
Console.WriteLine(square(5)); // Output: 25

Dim square As Func(Of Integer, Integer) = Function(x) x * x
Console.WriteLine(square(5)) ' Output: 25

public class BaseClass {
    public void Display() {
        Console.WriteLine("Base display");
    }
}
public class DerivedClass : BaseClass {
    public new void Display() {
        Console.WriteLine("Derived display");
    }
}

Public Class BaseClass
	Public Sub Display()
		Console.WriteLine("Base display")
	End Sub
End Class
Public Class DerivedClass
	Inherits BaseClass

	Public Shadows Sub Display()
		Console.WriteLine("Derived display")
	End Sub
End Class

public class Container<T> where T : new() {
    public T CreateItem() {
        return new T(); //new T
    }
}

public class Container(Of T) where T : New() {
	public T CreateItem() { Return New T(); }
}

using IronPdf;
using System;
namespace IronPdfExample
{
    class Program
    {
//static void main
        static void Main(string [] args)
        {
            IronPdf.License.LicenseKey = "License-Key";
            // Create a new PDF document from HTML content
            var renderer = new ChromePdfRenderer();
            var pdf = renderer.RenderHtmlAsPdf("<h1>Hello, World!</h1><p>This is a PDF generated from HTML using IronPDF.</p>");
            // Save the PDF to a file
            string filePath = "HelloWorld.pdf";
            pdf.SaveAs(filePath);
            // Confirmation message
            Console.WriteLine($"PDF file has been generated at: {Environment.CurrentDirectory}\\{filePath}");
        }
    }
}

Imports IronPdf
Imports System
Namespace IronPdfExample
	Friend Class Program
'static void main
		Shared Sub Main(ByVal args() As String)
			IronPdf.License.LicenseKey = "License-Key"
			' Create a new PDF document from HTML content
			Dim renderer = New ChromePdfRenderer()
			Dim pdf = renderer.RenderHtmlAsPdf("<h1>Hello, World!</h1><p>This is a PDF generated from HTML using IronPDF.</p>")
			' Save the PDF to a file
			Dim filePath As String = "HelloWorld.pdf"
			pdf.SaveAs(filePath)
			' Confirmation message
			Console.WriteLine($"PDF file has been generated at: {Environment.CurrentDirectory}\{filePath}")
		End Sub
	End Class
End Namespace