It's unoffical library of WargamingAPI on .NET Core. With it, you shouldn't write URL - request for getting data. You only have to call methods from it.
.NET 5 (Windows, Linux and MacOS).
You have to create file data.xml. Then, you need to put this:
<?xml version="1.0" encoding="utf-8"?>
<wot>
<apiKey>INSERT YOUR APP KEY GENEREATED BY WARGAMING</apiKey>
</wot>
Then, it should works.
Work in progress.