找不到资源“themes/materialdesigntheme.defaults.xaml”

在使用MaterialDesignThemes.Wpf 5.0版本后。

继续使用原来的资源文件，会报错。

<ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Light.xaml" />
<ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Defaults.xaml" />
<ResourceDictionary Source="pack://application:,,,/MaterialDesignColors;component/Themes/Recommended/Primary/MaterialDesignColor.DeepPurple.xaml" />
<ResourceDictionary Source="pack://application:,,,/MaterialDesignColors;component/Themes/Recommended/Accent/MaterialDesignColor.Lime.xaml" />

 官方文档给出的3.0及以上配置，也不行。

https://github.com/MaterialDesignInXAML/MaterialDesignInXamlToolkit/wiki/Getting-Started

最后是在源代码的DEMO上找到了最新的URI

 <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesign3.Defaults.xaml" />

改成这样即可。