Start task in constructor.

Author: HP712

src/Microsoft.IdentityModel.Tokens/EventBasedLRUCache.cs

@@ -59,7 +59,7 @@ internal class EventBasedLRUCache<TKey, TValue>
         private int _compactValuesState = ActionNotQueued;
         private int _removeExpiredValuesState = ActionNotQueued;
         private int _processCompactedValuesState = ActionNotQueued;
-        private Task _eventQTask;
+        private readonly Task _eventQTask;
         private int _eventQueuePollingInterval = 50; // in milliseconds
         // for testing purpose only to verify the task count
         private int _taskCount;
@@ -112,6 +112,7 @@ internal EventBasedLRUCache(
             _compactIntervalInSeconds = compactIntervalInSeconds;
             _timeForNextExpiredValuesRemoval = DateTime.UtcNow.AddSeconds(_removeExpiredValuesIntervalInSeconds);
             _maintainLRU = maintainLRU;
+            _eventQTask = Task.Run(EventQueueTaskAction);
         }
 
         /// <summary>
@@ -136,9 +137,6 @@ internal EventBasedLRUCache(
 
         private void AddActionToEventQueue(Action action)
         {
-            if (_eventQTask == null || _eventQTask.Status != TaskStatus.Running)
-                _eventQTask = Task.Run(EventQueueTaskAction);
-
             _eventQueue.Enqueue(action);
         }