Adorners Overview https://docs.microsoft.com/en-us/dotnet/framework/wpf/controls/adorners-overview 'Adorner' is a namespace but is used like a type 添加一目录:Adorner就出现这问题 将目录名改为:Adorners ,问题解决 这个Adorner写的不错:http://www.linovo.me/net/csharp/wpf/adorner-in…