/// <summary>
/// Maximum time lockout for a BrokeredMessage is 5 minutes. This allows the
/// timer to relock every 4 minutes while waiting on Task parameter to complete.
/// </summary>
/// <param name="task"></param>
/// <param name="message"></param>
private void WaitAndRelockMessage( Task task, BrokeredMessage message )
{
    var myTimer = new Timer( new TimerCallback( RelockMessage ), message, 240000, 240000 );

    task.Wait();

    myTimer.Dispose();
}

private void RelockMessage( object message )
{
    try
    {
        ((BrokeredMessage)message).RenewLock();
    }
    catch( OperationCanceledException )
    { }
}