The package containsWIX (Windows Installer Xml) Toolset v3.14.1 required for Wix#. Wix# is a framework for building a complete MSI by using build script files written with the C# syntax. Note WiX binaries do not belong to WiX# and they are licenced by their own licencing agreement.
$ dotnet add package WixSharp.wix.binNo README available.