private void EndOnEndRequest(IAsyncResult result)
 {
     TaskAsyncHelper.EndTask(result);
 }
 private void EndOnReleaseState(IAsyncResult result)
 {
     TaskAsyncHelper.EndTask(result);
 }
 private void EndAcquireState(IAsyncResult result)
 {
     TaskAsyncHelper.EndTask(result);
 }