System.Web.HttpApplicationState.UnLock C# (CSharp) Method

		public void UnLock ()
		{
			_Lock.ExitWriteLock ();
		}

 private string GetSessionId(HttpApplicationState Application)
 {
     if (Application["sessionId"] == null)
     {
         Application.Lock();
         Application["sessionId"] = opentok.CreateSession().Id;
         Application.UnLock();
     }
     return (string)Application["sessionId"];
 }