private void DoNotifyStyleChanged <TStyle>(StyleCollection <TStyle> styleCollection, TStyle style) where TStyle : class, IStyle
{
if (styleCollection == null)
{
throw new ArgumentNullException("styleCollection");
}
if (style == null)
{
throw new ArgumentNullException("style");
}
// create and set new PreviewStyle if the style is in the currently active design
if (styleCollection.ContainsPreviewStyle(style))
{
TStyle previewStyle = styleCollection.GetPreviewStyle(style);
Debug.Assert(previewStyle != null);
ToolCache.NotifyStyleChanged(previewStyle);
}
ToolCache.NotifyStyleChanged(style);
}