interface IFoo

{

    public void Bootstrap();

}

​

public static class Extensions

{

    public static void BootstrapAll<T>(this IEnumerable<T> list) where T : IFoo

    {

        // rider is complaining about IFoo here but this is surely safe, no?

        foreach (IFoo blah in list)

        {

            blah.Bootstrap();

        }

    }

}