Anonymous pipes server and client examples.

AnonymousPipes.cs

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

namespace dotNetPlayGround
{
    class AnonymousPipesServer
    {
        static void Main()
        {
            Process adder = new Process();
            adder.StartInfo.FileName = "AnonymousPipesClient.exe";
            adder.StartInfo.UseShellExecute = false;
            adder.StartInfo.RedirectStandardOutput = true;
            using (AnonymousPipeServerStream serverPipe = new AnonymousPipeServerStream(PipeDirection.Out, HandleInheritability.Inheritable, 100))
            {
                adder.StartInfo.Arguments = serverPipe.GetClientHandleAsString();//arguments are passed thru the funnel extended by client.
                adder.Start();
                serverPipe.DisposeLocalCopyOfClientHandle();
                serverPipe.Write(System.Text.Encoding.UTF8.GetBytes("3 4"),0,System.Text.Encoding.UTF8.GetByteCount("3 4"));
            }
            StreamReader reader = adder.StandardOutput;
            Console.WriteLine("Sever:Adder:{0}",reader.ReadToEnd());
            adder.WaitForExit();
        }
        
        class AnonymousPipesClient
    {
        static int Main(string[] handle)
        {
            if (handle.Length > 0)
            {
                using (AnonymousPipeClientStream clientPipe = new AnonymousPipeClientStream(PipeDirection.In, handle[0]))
                {
                    byte[] buffer = new byte[100];
                    clientPipe.Read(buffer, 0, buffer.Length);
                    string arguments = Encoding.UTF8.GetString(buffer);
                    string[] args = arguments.Split(' ');
                    int a = int.Parse(args[0]);
                    int b = int.Parse(args[1]);
                    Console.Write(a + b);
                    return a + b;
                }
            }
            return -1;
        }
    }
    }
}