private void InvalidateBrush()
{
// Delay brush updates until Tick to coalesce changes and avoid rebuilding the effect when we don't need to.
if (!_needsBrushUpdate)
{
_needsBrushUpdate = true;
SharedHelpers.QueueCallbackForCompositionRendering(() =>
{
{
UpdateBrush();
}
_needsBrushUpdate = false;
});
}
}