vb.net - 无法使用 WP7 在文本文件中写入短信

Question

我无法在我的 wp7 应用程序的文本文件中写入文件，我该怎么办？

这是我的代码

 Dim isolatedStorage As IsolatedStorageFile = IsolatedStorageFile.GetUserStoreForApplication
 Dim isoStream As IsolatedStorageFileStream = New IsolatedStorageFileStream("TextFile1.txt", FileMode.Append, isolatedStorage)
 Dim streamwriter As StreamWriter = New StreamWriter(isoStream)

 streamwriter.WriteLine("sample")
 streamwriter.Close()

我也尝试将它放在 Using 语句中，但它现在仍在文本文件中写入

Dim isolatedStorage As IsolatedStorageFile = IsolatedStorageFile.GetUserStoreForApplication
        Using isoStream As IsolatedStorageFileStream = New IsolatedStorageFileStream("/TextFile1.txt", FileMode.Append, isolatedStorage)

            Using streamwriter As StreamWriter = New StreamWriter(isoStream)
                streamwriter.WriteLine("PreMenu.xaml")

                streamwriter.Close()
            End Using
        End Using

没有错误，但它没有在文本文件中写入文本，我该怎么办？