Noddy C# IPC with WinForms Example

IReceiver.cs

namespace Receiver
{
    using System.ServiceModel;

    [ServiceContract]
    public interface IReceiver
    {
        [OperationContract]
        void AddLine();
    }
}

ReceiverForm.cs

namespace Receiver
{
    using System;
    using System.Globalization;
    using System.ServiceModel;
    using System.Windows.Forms;

    [ServiceBehavior(InstanceContextMode = InstanceContextMode.Single)]
    public partial class ReceiverForm : Form, IReceiver
    {
        private readonly Random rng = new Random();

        public ReceiverForm()
        {
            this.InitializeComponent();
        }

        public void AddLine()
        {
            var value = this.rng.Next(100).ToString(CultureInfo.InvariantCulture);
            this.textBox.Text += value + Environment.NewLine;
        }

        private void OnButtonClick(object sender, System.EventArgs e)
        {
            this.AddLine();
        }
    }
}

ReceiverProgram.cs

namespace Receiver
{
    using System;
    using System.ServiceModel;
    using System.Windows.Forms;

    internal static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        public static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            var form = new ReceiverForm();

            using (var host = new ServiceHost(form, new[] { new Uri("net.pipe://localhost") }))
            {
                host.AddServiceEndpoint(typeof(IReceiver), 
                                        new NetNamedPipeBinding(), 
                                        "TestReceiver");
                try
                {
                    host.Open();
                }
                catch (AddressAlreadyInUseException ex)
                {
                    return;
                }
                
                Application.Run(form);
                host.Close();
            }
        }
    }
}

TransmitterForm.cs

namespace Transmitter
{
    using System.ServiceModel;
    using System.Windows.Forms;

    using Receiver;

    public partial class TransmitterForm : Form
    {
        private IReceiver receiver;

        public TransmitterForm()
        {
            this.InitializeComponent();

            var factory = new ChannelFactory<IReceiver>(
                new NetNamedPipeBinding(),
                new EndpointAddress("net.pipe://localhost/TestReceiver"));
            this.receiver = factory.CreateChannel();
        }

        private void OnButtonClick(object sender, System.EventArgs e)
        {
            try
            {
                this.receiver.AddLine();
            }
            catch (FaultException ex)
            {
                // Service call failed - possibly because the receiver isn't
                // running.
            }
        }
    }
}