Selenium is a great product for browser automation. It allows me to build great suites of interface tests. The only issue is the code to implement Selenium in the C# world isn't very clean. With a single page application, the developers end up with a lot of Thread sleeps, complex selection queries, etc. Enter Coypu.
Coypu is a C# wrapper around Selenium with an API inspired by Capybara. This means coding to Coypu is very straightforward.