'这个应该是你要的。删除文件夹下面的所有内容：包括文件，文件夹。
    Public Sub DeleteFoldeSubFF(ByVal fpath As String)
        Try
            For Each fd As DirectoryInfo In GetFolderS(fpath)
                DeleteFolder(fd.FullName)
            Next
            For Each fi As FileInfo In GetFileS(fpath)
                DeleteFile(fi.FullName)
            Next
        Catch ex As Exception
            MsgBox(ex.Message,MsgBoxStyle.Information)
        End Try
    End Sub
 
'删除文件。
    Public Sub DeleteFile(ByVal fpath As String)
       If IO.File.Exists(fpath) Then
            '删除文件file的方法1:删除到回收站里面。
            My.Computer.FileSystem.DeleteFile(fpath,FileIO.UIOption.OnlyErrorDialogs,FileIO.RecycleOption.SendToRecycleBin,FileIO.UICancelOption.DoNothing)
            '删除文件file的方法2:直接从硬盘上删除。
            'IO.File.Delete(fpath)
        End If
    End Sub
 
'删除文件夹。
 Public Sub DeleteFolder(ByVal folder As String) 
        If IO.Directory.Exists(folder) Then
            '删除文件夹folder的方法1:删除到回收站里面。
            My.Computer.FileSystem.DeleteDirectory(folder,FileIO.UICancelOption.DoNothing)
            '删除文件夹folder的方法2:直接从硬盘上删除。
            'IO.Directory.Delete(folder,True)
        End If
    End Sub