correctly redirecting i/o to a process started via a c#

app.js

var rl = require('readline');
var fs = require('fs');
var util = require('util');
var log = fs.createWriteStream('trace.log');
var out = process.stdout;

function format(dt) {
    var h = dt.getHours(),
        m = dt.getMinutes(),
        s = dt.getSeconds();
    return [h, m, s].join(':');
}
console.log = function () {
    log.write(util.format.apply(null, arguments) + '\r\n');
    out.write(util.format.apply(null, arguments) + '\r\n');
};

var stdinParser = rl.createInterface({
    input: process.stdin
});

var count = 0;
stdinParser.on('line', function (line) {
    if (line.length) count++;
});

stdinParser.on('close', function () {
    var dt = new Date();
    console.log('Count:', count);
    console.log(format(dt));    
});

console.log('started...');

Program.cs

using System;
using System.Diagnostics;
using System.IO;

namespace caStreamedInput
{
    class Program
    {
        static string Ask()
        {
            Console.Write("Input file path:");
            return Console.ReadLine();
        }

        static void Main(string[] args)
        {
            var file = @"D:\misc\capture635985621180258666.txt";
            var proc = new Process();
            string data = string.Empty;
            //ManualResetEvent evt = new ManualResetEvent(false);
            proc.OutputDataReceived += (sndr, resp) =>
            {
                Console.WriteLine("Received: {0}", resp.Data);                
            };

            proc.ErrorDataReceived += (sndr, errEvt) =>
            {
                Console.WriteLine("ERR: {0}", errEvt.Data);
            };

            var si = new ProcessStartInfo(@"c:\Program Files\nodejs\node.exe", @"app.js");
            si.WorkingDirectory = @"C:\Users\arun_jayapal\Documents\Visual Studio 2015\Projects\StreamedInputDemo\njsConsoleApp";
            si.RedirectStandardInput = true;
            si.RedirectStandardOutput = true;
            si.RedirectStandardError = true;

            si.UseShellExecute = false;
            
            proc.StartInfo = si;
            proc.Start();

            //proc.StandardInput.Write(File.ReadAllText(file));
            //proc.StandardInput.Close();
            File.OpenRead(file).CopyToAsync(proc.StandardInput.BaseStream).ContinueWith((_) =>
            {
                proc.StandardInput.Close();
            });

            Console.WriteLine("Waiting...");
            proc.BeginOutputReadLine();
            proc.WaitForExit();
            proc.Close();

            Console.WriteLine("Data: {0}", data);
            Console.WriteLine("end");
        }
    }
}