How can I implement a TextWriter in order to append a timestamp to each line writen to the console?

My apologies if this has already been answered, I've tried my best to look.

I have a library that writes some information to the console. In the application that uses the library, I'd like to redirect that output to a control as well as a log file, while writing a timestamp at the beginning of each line. This is what my class looks like:

class TextBoxStreamWriter : Te开发者_如何学运维xtWriter
{
    TextBox _output;
    FileStream _stream;
    StreamWriter _writer;

    // constructor
    public TextBoxStreamWriter(TextBox output)
    {
        _output = output;

        _stream = new FileStream(@"C:\example.log", FileMode.OpenOrCreate, FileAccess.Write);
        _writer = new StreamWriter(_stream);
        _writer.AutoFlush = true;
    }

    // override methods
    public override void Write(char value)
    {
        base.Write(value);
        _output.AppendText(value.ToString());
        _writer.Write(value);
    }
    public override void WriteLine(string value)
    {
        base.WriteLine(DateTime.Now.ToString("[yyyy/MM/dd HH:mm:ss]\t") + value);
    }

This seems to work fine as long as you're using Console.WriteLine() of course. But we I try to direct the output of an XMLWriter to the console, this bypasses Console.WriteLine(), and thereby starts printing lines without the timestamp. One example could be this:

    protected void WriteXMLToConsole(XmlDocument xmlDocument)
    {
        XmlTextWriter writer = new XmlTextWriter(Console.Out);
        writer.Formatting = Formatting.Indented;
        xmlDocument.WriteContentTo(writer);
        writer.Flush();
        Console.WriteLine();
    }

Any suggestions?

Thanks for your help!

It's probably because the xmlDoc is recieved as a single string containing NewLine.
Try reading the xmlDoc as a plain text-file, and sendt that text to console line-by-line