VB.NET中如何选择保存打印机名称配置并重启后自动显示

功能需求 #

在VB.NET中实现以下功能：选择打印机名称并将其配置保存为字符串，重新打开窗体时，之前选中的打印机名称能自动显示在表单上。

用户编写的相关代码及配置文件 #

窗体后台代码 #

Private Sub configurationfile()
    Dim reader As New System.Configuration.AppSettingsReader
    Dim PrinterName As String = reader.GetValue("PrinterName", GetType(String)).ToString().Replace(",", "")

    If Not String.IsNullOrEmpty(PrinterName) Then
        TextBox1.Text = PrinterName
        CheckBox1.Checked = True
    End If
End Sub

Private Sub CheckBox1_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CheckBox1.CheckedChanged
    Dim fullpath = Application.StartupPath + "\rawprinting.exe"
    Dim config As Configuration = ConfigurationManager.OpenExeConfiguration(fullpath)
    config.AppSettings.Settings.Remove("PrinterName")
    If CheckBox1.Checked Then
        config.AppSettings.Settings.Add("PrinterName", TextBox1.Text)
    Else
        config.AppSettings.Settings.Add("PrinterName", "")
    End If

    '保存App.config文件中的修改
    config.Save(ConfigurationSaveMode.Modified)
End Sub

Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    Dim printer As String = TextBox1.Text
End Sub

App.config配置文件 #

<?xml version="1.0" encoding="utf-8"?>
<configuration>
    <appSettings>
        <add key="PrinterName" value="Generic / Text Only" />
    </appSettings>
</configuration>

内容的提问来源于stack exchange，提问作者roy