Examples here: https://help.syncfusion.com/aspnet-core/tab/getting-started
relating to using the razor syntax do not produce the markup stated, instead the output is just the return type of the razor helper (Microsoft.AspNetCore.Mvc.Razor.HelperResult).
Using library 14.4600.0.20-preview2-final
If anyone can confirm that this is a bug I'll log it as such.
Attachment:
example_aefc92cd.zip