using System;
using System.IO.Pipes;
using System.Threading.Tasks;

class Program {
    static async Task Main() {
        var server = new NamedPipeServerStream("global\\testpipe", PipeDirection.InOut, 1, PipeTransmissionMode.Byte, PipeOptions.Asynchronous);
        var _ = server.WaitForConnectionAsync();
        
        var client = new NamedPipeClientStream(".", "testpipe", PipeDirection.InOut, PipeOptions.Asynchronous);
        try {
            await client.ConnectAsync(1000);
            Console.WriteLine("Connected with testpipe!");
        } catch {
            Console.WriteLine("Failed to connect with testpipe!");
        }

        var client2 = new NamedPipeClientStream(".", "global\\testpipe", PipeDirection.InOut, PipeOptions.Asynchronous);
        try {
            await client2.ConnectAsync(1000);
            Console.WriteLine("Connected with global\\testpipe!");
        } catch {
            Console.WriteLine("Failed to connect with global\\testpipe!");
        }
    }
}