Is there an HtmlUnitDriver for .NET?

I'm using Selenium's WebDriver to run some SpecFlow tests for an ASP.NET MVC app I'm working on for self-education.

Using FirefoxDriver, ChromeDriver, etc. all take so long to run, it's actually pretty frustrating to use them (in my opinion).

I have read about an HtmlUnitDriver that is supposedly much faster than the browser-based drivers; but I can't seem to find a version in the .NET client library (only Java). Is there a .NET version out there?