using System;

using System.IO;

using System.Threading.Tasks;

​

public class Program

{

    public static void Main()

    {

        // Get the output stream from the new process.

        TextReader stdout = new StringReader("Some sample text!");

​

        // Define a buffer we will use to store characters read.

        const int BUFFER_SIZE = 1;

        char[] buffer = new char[BUFFER_SIZE];

​

        bool done = false;

​

        // The following specifies reading from the output stream to a buffer

        // and then appending the result to the form.

        Task<int> readTask = stdout.ReadAsync(buffer, 0, BUFFER_SIZE);

        Action<Task<int>> appendAction = null;

​

        appendAction = (read) =>

        {

            string bufferString = new string(buffer);

            // `read.Result` represents the number of characters read.

            string newText = bufferString.Substring(0, read.Result);

            // *Append new text to form here.* NOTE: New text might not be a complete line.

            Console.Write(newText);

​

            // If we read in an entire buffer of text, we need to keep reading.

            // Otherwise, stop reading and finish up.

            if (read.Result == BUFFER_SIZE)

            {

                readTask = stdout.ReadAsync(buffer, 0, BUFFER_SIZE);

                readTask.ContinueWith(appendAction);

            }

            else

            {

                // *Handle process has ended here.*

                done = true;

            }

        };

        readTask.ContinueWith(appendAction);

​

        // Do a busy loop until the entire string has been read.

        while (!done) { }

        Console.WriteLine();

    }

}