如何创建记录登录详细信息的txt文件？VB.NET

Imports System.IO

Public Class LoginForm
    Private Sub btnLogin_Click(sender As Object, e As EventArgs) Handles btnLogin.Click
        ' 获取登录信息
        Dim username As String = txtUsername.Text
        Dim password As String = txtPassword.Text

        ' 创建记录登录信息的txt文件
        Dim filePath As String = "login_details.txt"

        ' 检查文件是否存在，如果不存在则创建文件
        If Not File.Exists(filePath) Then
            File.Create(filePath).Dispose()
        End If

        ' 将登录信息写入txt文件
        Using writer As New StreamWriter(filePath, True)
            writer.WriteLine("Username: " & username)
            writer.WriteLine("Password: " & password)
            writer.WriteLine("Login Time: " & DateTime.Now.ToString())
            writer.WriteLine("--------------------------------------")
        End Using

        ' 登录成功后的操作
        MessageBox.Show("登录成功！")

        ' 清空输入框
        txtUsername.Text = ""
        txtPassword.Text = ""
    End Sub
End Class