private void HideContentHelper()
{
if (_threadedHelper != null)
{
_threadedHelper.Stop();
_threadedHelper = null;
InvalidateMeasure();
}
}
private void CreateContentHelper()
{
_threadedHelper = new ThreadedVisualHelper(CreateContent, SafeInvalidateMeasure);
_hostVisual = _threadedHelper.HostVisual;
}