По ID процесса узнать количество потоков

public int GetCountThread(int processId)
        {
            int countThreads = 0;
            using (var currentProcess = System.Diagnostics.Process.GetProcessById(processId))
            {
                countThreads = currentProcess.Threads
                    .OfType<System.Diagnostics.ProcessThread>()
                    .Where(t => t.ThreadState == System.Diagnostics.ThreadState.Running)
                    .Count();
            }
            return countThreads;
        }

Process[] allProcess = Process.GetProcesses();

public int GetCountThread(int processId)
{
    int count = 0;
    using (var currentProcess = System.Diagnostics.Process.GetProcessById(processId))
    {
        var query = from thread in currentProcess.Threads.OfType<ProcessThread>() select thread;
        count = query.Count();
    }
    return count;
}