设置资源:
Application.Current.Resources["ApplicationScopeResource"] = Brushes.White;
使用代码获取资源:
Brush whiteBrush = (Brush)Application.Current.Resources["ApplicationScopeResource"];
参考资料:如何:获取和设置应用程序范围的资源 | Microsoft Docs
https://docs.microsoft.com/zh-cn/previous-versions/dotnet/netframework-4.0/aa348547(v=vs.100)
原文:https://www.cnblogs.com/wzwyc/p/10852328.html