c# - Mutex Across Threads? -

so, getting exception code below. have put exception details it, believe caused fact different thread releases lock 1 starts lock. want potentially allow main thread continue while writes queue , occur.

first , foremost, want know if there way can done? secondly, should done or bad plan? have looked @ manualresetevent, monitor , mutex of seem this. note, network server , first time writing multithreaded, potentially high traffic one.

exception: thrown first time send (and callback) called.

system.applicationexception on mutex.releasemutex(). "object synchronization method called unsynchronized block of code."

public void sendasync(byte[] packet) {     mutex.waitone();     client.getstream().beginwrite(packet, 0, packet.length, writecallback, null); }  private void writecallback(iasyncresult ar) {     client.getstream().endwrite(ar);     mutex.releasemutex();      console.writeline("sent data " + remoteendpoint); } 

considering -

i want potentially allow main thread continue while writes queue , occur.

first , foremost, want know if there way can done?

i don't think need mutex that. looking -

static object _lock = new object(); //somewhere based on context public void sendasync(byte[] packet) {     task.run(() =>         {             ..... other codes             lock (_lock)             {                 client.getstream().beginwrite(packet, 0, packet.length,                  ar => // write callback (lambda)                 {                     client.getstream().endwrite(ar);                     console.writeline("sent data " + remoteendpoint);                 }, null);             }         }); } 

explanation:

1. task.run runs asynchronously in threadpool, keeps main thread free time.
2. lock(_lock) ensures 1 thread writing stream @ single moment, (threads spawned threadpool task.run)
3. you don't need separate writecallback, use inline lambda callback methods. makes life easier.

let me know if solves problem.