Public Shared Sub Main()
Dim path As String = "c:\temp\MyTest.txt"
Dim fi1 As FileInfo = New FileInfo(path)

If fi1.Exists = False Then
'Create a file to write to.
Dim sw As StreamWriter = fi1.CreateText()
sw.WriteLine("Hello")
sw.WriteLine("And")
sw.WriteLine("Welcome")
sw.Flush()
sw.Close()
End If

'Open the file to read from.
Dim sr As StreamReader = fi1.OpenText()

Do While sr.Peek() >= 0
Console.WriteLine(sr.ReadLine())
Loop

Try
Dim path2 As String = path + "temp"
Dim fi2 As FileInfo = New FileInfo(path2)

'Ensure that the target does not exist.
fi2.Delete()

'Copy the file.
fi1.CopyTo(path2)
Console.WriteLine("{0} was copied to {1}.", path, path2)

'Delete the newly created file.
fi2.Delete()
Console.WriteLine("{0} was successfully deleted.", path2)

Catch e As Exception
Console.WriteLine("The process failed: {0}", e.ToString())
End Try
End Sub

[此贴子已经被作者于2006-9-1 17:19:44编辑过]

我试了，怎么出现错误，在Dim fi1 As FileInfo = New FileInfo(path)位置
提示需要类型。