US Chess Federation does not have a good way of exposing its data as a set of public APIs. All it has is a very outdated set of PHP forms that serve data as HTML. This set of tools parse that html and present data in a way that most of the applications can consume.
Install-Package uscf_tools -Version 1.1.0
dotnet add package uscf_tools --version 1.1.0
<PackageReference Include="uscf_tools" Version="1.1.0" />
paket add uscf_tools --version 1.1.0
This library heavily depends on the layout of USCF webpages return data. If they change it, then this whole thing won't work. I recomment not to use it for production projects.
.NETFramework 4.0 Client
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