c# SafeGuardLock安全锁mutex

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace HMC
{
   public class SafeGuardLock:IDisposable
    {
        public SafeGuardLock(Mutex nodelockfrom)
        {
            nodelock = nodelockfrom;
        }

        public void AcquireLock()
        {
            nodelock.WaitOne();
            lockheld = true;
        }

        public Mutex nodelock = null;
        private bool lockheld = false;
        public void Dispose()
        {
            if (lockheld)
            {
                nodelock.ReleaseMutex();
            }
        }
    }
}
  using (SafeGuardLock safelock = new SafeGuardLock(nodelock))
   {
                    safelock.AcquireLock();
}

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