C# UWP-修改文件时，RandomAccessStream退出

我试图在添加新行时读取文件的内容。 为此，我有以下代码

using (var inputStream = await file.OpenAsync(FileAccessMode.Read, StorageOpenOptions.AllowOnlyReaders))
        using (var streamReader = new StreamReader(inputStream.AsStream()))
        {
            string line;
            while ((line = streamReader.ReadLine()) != null)
            {
            }
            streamReader.Close();
            inputStream.Dispose();
        }

问题是，一旦文件被修改，inputstream的大小为0，循环就会退出

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我该如何解决这个问题呢？

对于任何有相同问题的人来说，这似乎是可行的

重要的部分是oldsize变量。你需要有if子句，否则它就不起作用了

using (var randAccessStream = await file.OpenAsync(FileAccessMode.Read, StorageOpenOptions.AllowReadersAndWriters))
        using (var inputStream = randAccessStream.AsStream())
        using (var streamReader = new StreamReader(inputStream))
        {
            var oldsize = randAccessStream.Size;
            string line;
            while ((line = streamReader.ReadLine()) != null)
            {
                if (oldsize != randAccessStream.Size) //Useless but seems to fix the bug
                {
                    oldsize = randAccessStream.Size;
                    await Task.Delay(100);
                }
            }

            await inputStream.FlushAsync();
            streamReader.Close();
            inputStream.Dispose();
            randAccessStream.Dispose();
        }