C# This（开发者如何使用）

public class Employee
{
    private int id;
    private string name;

    public void Display(int id, string name)
    {
        // Use `this.id` to refer to the instance variable, 
        // and `id` for the method parameter.
        this.id = id;
        this.name = name;
    }
}

Public Class Employee
	Private id As Integer
	Private name As String

	Public Sub Display(ByVal id As Integer, ByVal name As String)
		' Use `this.id` to refer to the instance variable, 
		' and `id` for the method parameter.
		Me.id = id
		Me.name = name
	End Sub
End Class

public class Student
{
    private string name;
    private int id;

    public Student() : this("Default", 0)
    {
        // Default constructor delegates to the parameterized constructor
        // with "Default" as the name and 0 as the id.
    }

    public Student(string name, int id)
    {
        // Assign the parameters to the instance variables
        this.name = name;
        this.id = id;
    }
}

Public Class Student
	Private name As String
	Private id As Integer

	Public Sub New()
		Me.New("Default", 0)
		' Default constructor delegates to the parameterized constructor
		' with "Default" as the name and 0 as the id.
	End Sub

	Public Sub New(ByVal name As String, ByVal id As Integer)
		' Assign the parameters to the instance variables
		Me.name = name
		Me.id = id
	End Sub
End Class

public static class StringExtensions
{
    // This extension method can be called on any string instance
    public static bool IsNullOrEmpty(this string str)
    {
        return string.IsNullOrEmpty(str);
    }
}

Public Module StringExtensions
	' This extension method can be called on any string instance
	<System.Runtime.CompilerServices.Extension> _
	Public Function IsNullOrEmpty(ByVal str As String) As Boolean
		Return String.IsNullOrEmpty(str)
	End Function
End Module

public class Test
{
    private int[] array = new int[100];

    // Define an indexer for the class
    public int this[int index]
    {
        get { return array[index]; }
        set { array[index] = value; }
    }
}

Public Class Test
	Private array(99) As Integer

	' Define an indexer for the class
	Default Public Property Item(ByVal index As Integer) As Integer
		Get
			Return array(index)
		End Get
		Set(ByVal value As Integer)
			array(index) = value
		End Set
	End Property
End Class

public class Program
{
    public static void Main(string[] args)
    {
        // Can't use `this` here, because 'Main' is a static method.
    }
}

Public Class Program
	Public Shared Sub Main(ByVal args() As String)
		' Can't use `this` here, because 'Main' is a static method.
	End Sub
End Class

public class Employee
{
    private string name;

    public string Name
    {
        get { return this.name; }
        set { this.name = value; } // Use `this` to refer to the instance variable
    }
}

Public Class Employee
'INSTANT VB NOTE: The field name was renamed since Visual Basic does not allow fields to have the same name as other class members:
	Private name_Conflict As String

	Public Property Name() As String
		Get
			Return Me.name_Conflict
		End Get
		Set(ByVal value As String)
			Me.name_Conflict = value
		End Set ' Use `this` to refer to the instance variable
	End Property
End Class

public delegate void DisplayDelegate();

public class Student
{
    public int Id { get; set; }
    public string Name { get; set; }

    public void Display()
    {
        // `this.DisplayDetails` refers to the method instance of the current object.
        DisplayDelegate displayDelegate = new DisplayDelegate(this.DisplayDetails);
        displayDelegate();
    }

    private void DisplayDetails()
    {
        Console.WriteLine("ID: " + Id + ", Name: " + Name);
    }
}

Public Delegate Sub DisplayDelegate()

Public Class Student
	Public Property Id() As Integer
	Public Property Name() As String

	Public Sub Display()
		' `this.DisplayDetails` refers to the method instance of the current object.
		Dim displayDelegate As New DisplayDelegate(AddressOf Me.DisplayDetails)
		displayDelegate()
	End Sub

	Private Sub DisplayDetails()
		Console.WriteLine("ID: " & Id & ", Name: " & Name)
	End Sub
End Class

using IronPdf;

public class PDFHandler
{
    private string path;

    public PDFHandler(string path)
    {
        this.path = path;
    }

    public void GeneratePDF(string content)
    {
        // Creating a renderer to convert HTML content to PDF
        var Renderer = new IronPdf.ChromePdfRenderer();
        var PDF = Renderer.RenderHtmlAsPdf(content);

        // Save the generated PDF to the path specified by the current instance
        PDF.SaveAs(this.path);
    }
}

Imports IronPdf

Public Class PDFHandler
	Private path As String

	Public Sub New(ByVal path As String)
		Me.path = path
	End Sub

	Public Sub GeneratePDF(ByVal content As String)
		' Creating a renderer to convert HTML content to PDF
		Dim Renderer = New IronPdf.ChromePdfRenderer()
		Dim PDF = Renderer.RenderHtmlAsPdf(content)

		' Save the generated PDF to the path specified by the current instance
		PDF.SaveAs(Me.path)
	End Sub
End Class

class Program
{
    static void Main(string[] args)
    {
        // Initialize PDFHandler with a specified file path
        PDFHandler pdfHandler = new PDFHandler("C:\\ThisKeyword.pdf");
        pdfHandler.GeneratePDF("Hello World!");
    }
}

Friend Class Program
	Shared Sub Main(ByVal args() As String)
		' Initialize PDFHandler with a specified file path
		Dim pdfHandler As New PDFHandler("C:\ThisKeyword.pdf")
		pdfHandler.GeneratePDF("Hello World!")
	End Sub
End Class