Point your browser to https://github.com/linvi/tweetinvi. The description of this library says it all:
Tweetinvi, the best Twitter C# library for the REST and Stream API. It supports .NET, .NETCore, UAP and Portable Class Libraries (Xamarin)...
In other words, this library is exactly what we need to create our Twitter clone application. Tweetinvi is really well documented and has an active community that supports it.
