private void toolStripMenuItemThumbnailOpenImage_Click(object sender, EventArgs e) { ToolStripItem toolStripItem = sender as ToolStripItem; if (toolStripItem != null) { ThumbnailContainer thumbnailContainer = toolStripItem.Tag as ThumbnailContainer; if (thumbnailContainer != null) { _worker.OpenMediaFile(thumbnailContainer.MediaFile); } } }