https://help.syncfusion.com/cr/uwp/Syncfusion.XPS.ResourceDictionary.html
Class ResourceDictionary - UWP API Reference | Syncfusion
Class ResourceDictionary - UWP API Reference
api referenceclassuwpsyncfusion
https://learn.microsoft.com/en-us/windows/windows-app-sdk/api/winrt/microsoft.ui.xaml.resourcedictionary.first?view=windows-app-sdk-1.8
ResourceDictionary.First Method (Microsoft.UI.Xaml) - Windows App SDK | Microsoft Learn
Returns an iterator for the items in the collection.
windows appfirstmethodmicrosoftui