Update Multiprocessor.cs

ZeroLevel/Services/Utils/Multiprocessor.cs

@@ -10,7 +10,7 @@ namespace ZeroLevel.Utils
     {
         private BlockingCollection<T> _queue = new BlockingCollection<T>();
         private List<Thread> _threads = new List<Thread>();
-        private bool _is_disposed = false;
+        private volatile bool _is_disposed = false;
         private int _tasks_in_progress = 0;
         public int Count => _queue.Count + _tasks_in_progress;
 
@@ -30,7 +30,7 @@ namespace ZeroLevel.Utils
                                 Interlocked.Increment(ref _tasks_in_progress);
                                 try
                                 {
-                                    handler(item);
+                                    handler?.Invoke(item);
                                 }
                                 finally
                                 {
@@ -76,14 +76,6 @@ namespace ZeroLevel.Utils
             {
                 _queue.CompleteAdding();
                 _queue.Dispose();
-                foreach (var thread in _threads)
-                {
-                    try
-                    {
-                        thread.Interrupt();
-                    }
-                    catch { }
-                }
             }
             catch { }
         }