var mutex = new Mutex(false, "TestShareMutex", out bool createdNew);
var commEvent0 = new EventWaitHandle(false, EventResetMode.ManualReset, "TestEvent0");
var attachEvent = new EventWaitHandle(false, EventResetMode.ManualReset, "TestAttachEvent");
if (!createdNew)
{
    mutex.WaitOne();
}
int waitTime = 9000000;

if (mutex.WaitOne(waitTime))
{
    attachEvent.Set();
    mutex.ReleaseMutex();
    bool b = mutex.WaitOne(waitTime);
    bool a = attachEvent0.WaitOne(waitTime);
    System.Diagnostics.Debug.WriteLine(a.ToString());
    Thread.Sleep(800);
    if (a && b)
    {
        mutex.ReleaseMutex();
    }
}

var mutex = new Mutex(false, "TestShareMutex", out bool createdNew);
var commEvent0 = new EventWaitHandle(false, EventResetMode.ManualReset, "TestEvent0");
var attachEvent = new EventWaitHandle(false, EventResetMode.ManualReset, "TestAttachEvent");
if (!createdNew)
{
    mutex.WaitOne();
}
int waitTime = 9000000;

if (mutex.WaitOne(waitTime))
{
    attachEvent.Set();
    mutex.ReleaseMutex();
    bool b = mutex.WaitOne(waitTime);
    bool a = attachEvent0.WaitOne(waitTime);
    System.Diagnostics.Debug.WriteLine(a.ToString());
    Thread.Sleep(800);
    if (a && b)
    {
        mutex.ReleaseMutex();
    }
}