Needs to be updated to current version of Blazor

[dbowser]

This does not seem to work with the current version of Blazor. When I try to build it I get many errors.

Could you please update it?

It is a very helpful example.

It would also be very helpful to see how to move the DownloadFile off to a utility class so it could be used from multiple components. It isn't clear to me how to access IJSRuntime if I do that.

Thanks so much!