Windows Phone 8.0 read file from IsolatedStorage - file

Question

I write a Datetime string in a file and after that try to read it back, but string returns interlaced with zero characters. WP Power tools show string intact "18.02.2015 12:08:17". But after reading it looks like:
"1\08\0.\00\02\0.\02\00\01\05\0 \01\02\0:\00\08\0:\01\07\0"
await FileExtensions.WriteDataToFileAsync("scheduleDateTime.txt", scheduleTime);
var contents = await FileExtensions.ReadFileContentsAsync("scheduleDateTime.txt");
public static async Task<String> ReadFileContentsAsync(string fileName)
{
StorageFolder local = Windows.Storage.ApplicationData.Current.LocalFolder;
if (local != null)
{
var file = await local.OpenStreamForReadAsync(fileName);
using (StreamReader streamReader = new StreamReader(file))
{
return streamReader.ReadToEnd();
}
}
else
{
return String.Empty;
}
}
public static async Task WriteDataToFileAsync(string fileName, string content)
{
byte[] data = Encoding.Unicode.GetBytes(content);
var folder = ApplicationData.Current.LocalFolder;
var file = await folder.CreateFileAsync(fileName, CreationCollisionOption.ReplaceExisting);
using (var s = await file.OpenStreamForWriteAsync())
{
await s.WriteAsync(data, 0, data.Length);
}
}

Answer 1

You're saving the file by using UTF-16 encoding, but reading it back using the default encoding (that is, UTF-8). You need to use the same encoding for both case.
Usually, the recommandation is to use UTF-8 to read and write in files, so you need to change your WriteDataToFileAsync method:
public static async Task WriteDataToFileAsync(string fileName, string content)
{
byte[] data = Encoding.UTF8.GetBytes(content);
var folder = ApplicationData.Current.LocalFolder;
var file = await folder.CreateFileAsync(fileName, CreationCollisionOption.ReplaceExisting);
using (var s = await file.OpenStreamForWriteAsync())
{
await s.WriteAsync(data, 0, data.Length);
}
}