Blazor Dropdown rendering

Anybody know why my dropdown would render like this?


I am new to Blazor I did notice in the getting started a mention of a stylesheet that doesn't exist.

My code is:

You need to include our CSS in the host page similar to our demo:

You will need our JavaScript as well:

Thanks when I tried this before I'm sure it said it couldn't find the stylesheet in the debug console but today it's working fine so maybe I had a typo, thanks for your help.