The blazor documentation describes how this should be done. I tried :
- specifying the name of the cascading parameter in both the definition. It makes sense that the names are necessary, how else would BUnit know which value should be applied to which CascadingParameter?
- Deleting my .vs folder and restarting Visual Studio.
- Changing the whitespace, putting the whole thing on a single line, the @ immediately after the ctx.Render(