The syntax is pretty great. I think you've used it before, but the syntax you're seeing is the Fluent Automation framework - it's an open source project that's been around for a couple years now. We recently released a ScriptCS version [1] of this that makes the syntax accessible to folks who aren't .NET developers or don't want all the weight of Visual Studio for writing and executing tests. More info on the Fluent Automation blog. [2]