https://github.com/ObjectivityLtd/Ocaramba
You can clone it and edit to cover your needs.
If you want to use our framework with SpecFlow first install “SpecFlow” plugin. Select Tools | Extensions and Updates from the menu in Visual Studio, switch to the Online search on the left and enter “SpecFlow” in the search field at the top right. More details here http://specflow.org/getting-started/