C# Error reading two dates from a binary file

Posted by Jamie on Stack Overflow See other posts from Stack Overflow or by Jamie
Published on 2010-05-18T09:18:49Z Indexed on 2010/05/18 9:20 UTC
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Hi all,

When reading two dates from a binary file I'm seeing the error below:

"The output char buffer is too small to contain the decoded characters, encoding 'Unicode (UTF-8)' fallback 'System.Text.DecoderReplacementFallback'. Parameter name: chars"

My code is below:

static DateTime[] ReadDates()
{
    System.IO.FileStream appData = new System.IO.FileStream(
       appDataFile, System.IO.FileMode.Open, System.IO.FileAccess.Read);

    List<DateTime> result = new List<DateTime>();
    using (System.IO.BinaryReader br = new System.IO.BinaryReader(appData))
    {
        while (br.PeekChar() > 0)
        {
            result.Add(new DateTime(br.ReadInt64()));
        }
        br.Close();
    }
    return result.ToArray();
}

static void WriteDates(IEnumerable<DateTime> dates)
{
    System.IO.FileStream appData = new System.IO.FileStream(
       appDataFile, System.IO.FileMode.Create, System.IO.FileAccess.Write);

    List<DateTime> result = new List<DateTime>();
    using (System.IO.BinaryWriter bw = new System.IO.BinaryWriter(appData))
    {
        foreach (DateTime date in dates)
            bw.Write(date.Ticks);
        bw.Close();
    }
}

What could be the cause? Thanks

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