In the realm of providing a decent implementation of the Chromium Embedded Framework (CEF) for .Net, the two leading options appear to be CefSharp and CefGlue. They differ in a
It is 2018. The project fortunes have changed quite a bit. CefSharp is alive and well with almost daily updates in the GitHub depository. Issues are getting resolved, currently only 57 open issues and 1787 closed. CefGlue does not seem to do well. The mailing lists are moribund, there have not been recent updates. There are two forks at GitHub that resolved issues beyond the last released CefGlue version.
The fundamentals have otherwise not changed. CefSharp takes a dependency on C++/CLI code, originally an easy way to get the .NET-to-C++ interop going. But that can only work on a Windows machine and in a project that targets the full desktop version of the .NET Framework.
But not Mono, not .NET Core (relevant to Xamarin and UWP apps), or any library or project that is meant to be portable to another OS. C++/CLI is not an option in such a scenario and pinvoke must be the fallback. So CefGlue.