' 导入命名空间
Imports System.IO

Module Module1
    Const fileName As String = "AppSettings.dat"

    Sub Main()
        WriteDefaultValues()
        DisplayValues()
    End Sub

    Sub WriteDefaultValues()
        Using writer As BinaryWriter = New BinaryWriter(File.Open(fileName, FileMode.Create))
            writer.Write(1.25F)
            writer.Write("c:\Temp")
            writer.Write(10)
            writer.Write(True)
        End Using
    End Sub

    Sub DisplayValues()
        Dim aspectRatio As Single
        Dim tempDirectory As String
        Dim autoSaveTime As Integer
        Dim showStatusBar As Boolean

        If (File.Exists(fileName)) Then

            Using reader As BinaryReader = New BinaryReader(File.Open(fileName, FileMode.Open))
                aspectRatio = reader.ReadSingle()
                tempDirectory = reader.ReadString()
                autoSaveTime = reader.ReadInt32()
                showStatusBar = reader.ReadBoolean()
            End Using

            Console.WriteLine("Aspect ratio set to: " & aspectRatio)
            Console.WriteLine("Temp directory is: " & tempDirectory)
            Console.WriteLine("Auto save time set to: " & autoSaveTime)
            Console.WriteLine("Show status bar: " & showStatusBar)
        End If
    End Sub

End Module

' 导入命名空间
Imports System
Imports System.IO

Public Class MainClass

  Shared Sub Main()

    Dim aFileStream As FileStream
    Try
      aFileStream = New FileStream("test.txt", FileMode.OpenOrCreate,FileAccess.Write)
      Dim myBinaryWriter As New BinaryWriter(aFileStream)
      myBinaryWriter.Write("Hello world")
      myBinaryWriter.Write(1)
    Catch e As Exception
      Console.WriteLine(e.StackTrace)
    Finally
      If Not (aFileStream Is Nothing) Then aFileStream.Close()
    End Try
  End Sub
  
End Class