Console.ReadLine() not working with .net Framework > 3.5

Here is a dummy sample code for the master app:
It uses the Qt framework, and is a Qt console application.
Type ping in the console, and the C# app should answer ping back.

#include <QCoreApplication>
#include <QProcess>
#include <iostream>
#include <string>
using namespace std;

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    // Path to the C# executable
    QString program = "D:/Documents/ConsoleApplication1/ConsoleApplication1/bin/Release/ConsoleApplication1.exe";

    // Start child Process
    QProcess * process = new QProcess();
       process->setProgram(program);
       // Execute lambda function whenever a message from the process is received
       QObject::connect(process, &QProcess::readyReadStandardOutput, [&](){ cout << process->readAll().toStdString(); } );
       process->start();

    string text;
    cin >> text;
    process->write( QByteArray::fromStdString(text) + "\r\n" );

    return a.exec();
}