IPCTester.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;
using System.Net.Sockets;
using System.IO;
using System.IO.Pipes;
using System.Text;

public class IPCTester : MonoBehaviour {
    NamedPipeClientStream clientStream;
    StreamWriter writer;
    StreamReader reader;

    void Start() {
        clientStream = new NamedPipeClientStream("tmp-app.normal");
        clientStream.Connect();
        writer = new StreamWriter(clientStream);
        reader = new StreamReader(clientStream);
    }
	
	void Update() {
		
	}

    void Ping() {
        string pingString = "{ \"type\": \"pong\", \"data\": { \"status\": \"ok\" }\r\n";
        byte[] buffer = Encoding.UTF8.GetBytes(pingString);

        clientStream.WaitForPipeDrain();

        writer.Write(pingString);
        writer.Flush();
    }

    private void OnGUI() {
        if (GUI.Button(new Rect(10, 10, 150, 100), "Ping"))
            Ping();
    }

    private void OnApplicationQuit() {
        clientStream.Dispose();
    }
}