internal PreviewEventArgs(PreviewFrame preview) { Preview = preview; }
internal ExtraPreviewEventArgs(PreviewFrame preview, int streadId) { Preview = preview; StreamId = streadId; }
internal PreviewEventArgs(PreviewFrame preview) { Preview = preview; }
internal ExtraPreviewEventArgs(PreviewFrame preview, int streadId) { Preview = preview; StreamId = streadId; }