service.cs

private void Process()
{
    while (!finalizeService)
    {
        PerformanceCounter PC = new PerformanceCounter();
        PC.CategoryName = "Processor";
        PC.CounterName = "% Processor Time";
        PC.InstanceName = "_Total";
        PC.ReadOnly = true;
        var value = PC.NextValue();
        Thread.Sleep(1000);
        value = PC.NextValue();
        PC.Close();
        PC.Dispose();

        PerformanceCounter ramCounter = new PerformanceCounter("Memory", "Available MBytes", true);
        var ramValue = ramCounter.NextValue();
        if (ramValue <= MinRAMAvailable)
        {
            SendAlertMessage(AlertType.RAM_ALERT, value,Convert.ToInt64(ramValue));
        }

        if (value >= MaxCPUUsage)
        {
            totalHits = totalHits + 1;
            if (totalHits == Period)
            {
                SendAlertMessage(AlertType.PROCESS_ALERT, value, Convert.ToInt64(ramValue));
                totalHits = 0;
            }
        }
        else
        {
            totalHits = 0;
        }

    }
    eventLog.WriteEntry(ServiceName +  " stoped.");
}