C# New（开发者如何使用）

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();
    }
}

Public Class Container(Of T As New)
	Public Function CreateItem() As T
		Return New T()
	End Function
End Class

using IronPdf;
using System;

namespace IronPdfExample
{
    class Program
    {
        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
		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