在运行时将C ++控制台输出重定向到C＃

Question

我遇到了使C ++ exe和C＃模块协同工作的问题。虽然我已经使用了stackoverflow线程Redirecting C++ console output to C#中描述的OutputDataReceived，但只有在C ++ exe终止后才能获得输出。以下就是我所拥有的，

 private void Form1_Load(object sender, EventArgs ex)
{
    Process process = new Process();
    process.StartInfo.UseShellExecute = false;
    process.StartInfo.RedirectStandardOutput = true;
    process.StartInfo.FileName = "C:\\path\\app.exe";
    process.OutputDataReceived += Process_OutputDataReceived;
    process.Start();
    process.BeginOutputReadLine();
}

void Process_OutputDataReceived(object sender, DataReceivedEventArgs e)
{
    if(e.Data != null){
    string s = e.Data.ToString();
    Console.WriteLine(s);
    }
}     

有谁能让我知道我在这里缺少什么？

谢谢。