代码在休息后仍然循环

Question

我有3个同一个应用运行的实例。如果我有我的程序标记要杀死它，它工作正常，2继续运行。当我标记另一个被杀死时，它会杀死剩下的2个，而不仅仅是一个。如果我在“break;”之前放置一个消息框，它可以正常工作，只会再杀一个并留下一个正在运行。但是如果没有消息框，当我尝试杀死第二个实例时，它总是会杀死一个和第三个实例。知道为什么一个消息框会让它正常工作吗？我假设某种类型的计时问题，但我无法弄清楚为什么，因为有一个“休息”。

foreach (WatcherScraperModel scraper in this.Scrapers.Except(scheduled.Where(x => x.Active)))
{
    totalinstances = 0;
    foreach (Process process in Process.GetProcesses())
    {
        try
        {
            if (process.MainModule.FileName == scraper.FileName)
            {
                // get instances already running
                totalinstances++;
            }
        }
        catch
        {
            // certain core processes cannot be accessed, don't worry about it
        }
    }
    foreach (Process process in Process.GetProcesses())
    {
        try
        {
            // only kill an instance if there's too many running
            if (process.MainModule.FileName == scraper.FileName && totalinstances > scheduled.Count(x => x.Active && x.FileName == scraper.FileName))
            {
                logger.DebugFormat("Killed {0} because it was not scheduled to be running", scraper.FileName);
                process.Kill();
                scraper.RestartRemaining = 0;
                break;
            }
        }
        catch
        {
            // certain core processes cannot be accessed, don't worry about it
        }
    }
}