Behaviors with LINQ syntax using a scenario monad

_Original.cs

public class IntervalComparisons : Behavior
{
    [Scenario]
    public void GreaterThan()
    {
        var result =
            from left in Given("an interval", Interval.WholeStep)
            from right in And("a lesser interval", Interval.HalfStep)
            select When("comparing them", left.CompareTo(right));

        Then("the result is 1", () => result.Should().Be(1));
    }
}

NoBaseClass.cs

public class IntervalComparisons
{
    [Scenario]
    public void Linq_NoBaseClass()
    {
        var result =
            from left in "Given an interval".Of(Interval.WholeStep)
            from right in "And a lesser interval".Of(Interval.HalfStep)
            select "When comparing them".Do(left.CompareTo(right));

        "Then the result is 1".Do(() => result.Should().Be(1));
    }

    [Scenario]
    public void NoLinq_InlineAssignments()
    {
        var left = "Given an interval".Given(() => Interval.WholeStep);
        var right = "And a lesser interval".And(() => Interval.HalfStep);

        var result = "When comparing them".When(() => left.CompareTo(right));

        "Then the result is 1".Then(() => result.Should().Be(1));
    }
}