tbf/AppDiagnostic/Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace AppDiagnostic
{
    internal static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            bool isFirstInstance;

            using (var instanceMutex = new Mutex(true, "Sensus.AppDiagnostic.SingleInstance", out isFirstInstance))
            using (var activationEvent = new EventWaitHandle(false, EventResetMode.AutoReset, "Sensus.AppDiagnostic.Activate"))
            {
                if (!isFirstInstance)
                {
                    activationEvent.Set();
                    return;
                }

                Application.EnableVisualStyles();
                Application.SetCompatibleTextRenderingDefault(false);

                using (var diagnosticServer = new DiagnosticPipeServer(DiagnosticLogStore.Instance.Add))
                {
                    diagnosticServer.Start();
                    Application.Run(new MainForm(() => diagnosticServer.ConnectedClientCount, () => activationEvent.WaitOne(0)));
                }
            }
        }
    }
}