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Why is this legacy set executed multiple times?

I understand that each Establishshould be executed only once, but the code below shows that it is executed several times. We place classes to provide some grouping, storing unit tests for an object in a single file. This seems to be a mistake.

We use machine.specifications.runner.resharper Extension Reshaper and MSpec 0.9.1.

[Subject(typeof(string))]
internal class EstablishRunTwice {
    Establish sharedContext = () => Console.WriteLine("Shared context");

    internal class ScenarioA : EstablishRunTwice {
        Establish scenarioAContext = () => Console.WriteLine("ScenarioA context");

        internal class ScenarioAVariation1 : ScenarioA {
            Because of = () => Console.WriteLine("ScenarioAVariation1 Because");

            It it1 = () => Console.WriteLine("ScenarioAVariation1 It1");

            It it2 = () => Console.WriteLine("ScenarioAVariation1 It2");
        }

        internal class ScenarioAVariation2 : ScenarioA {
            Because of = () => Console.WriteLine("ScenarioAVariation2 Because");

            It it1 = () => Console.WriteLine("ScenarioAVariation2 It1");

            It it2 = () => Console.WriteLine("ScenarioAVariation2 It2");
        }
    }

    internal class ScenarioB : EstablishRunTwice {
        Establish context = () => Console.WriteLine("ScenarioB context");

        Because of = () => Console.WriteLine("ScenarioB Because");

        It it1 = () => Console.WriteLine("ScenarioB It1");

        It it2 = () => Console.WriteLine("ScenarioB It2");
    }
}

As a result, this is for ScenarioAVariation1:

Shared context
Shared context
ScenarioA context
Shared context
Shared context
ScenarioA context
ScenarioAVariation1 Because
ScenarioAVariation1 It1
ScenarioAVariation1 It2

When we ran our own custom context specification environment using NUnit, we had problems running NUnit, making sure all subclasses are abstract (in this case InstallRunTwice and ScenarioA will be abstract), but MSpec triggers an error attempt for this.

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[Behaviors]
internal class DenebRightAscension
    {
    It should_have_20_hours_ = () => UUT.Degrees.ShouldEqual(20u);
    It should_have_41_minutes = () => UUT.Minutes.ShouldEqual(41u);
    It should_have_59_seconds = () => UUT.Seconds.ShouldEqual(59u);
    protected static Bearing UUT;
    }


[Subject(typeof(HourAngle), "sexagesimal")]
internal class when_converting_hour_angle_to_sexagesimal
{
    Because of = () =>
    {
        RaDeneb = 20.6999491773451;
        UUT = new Bearing(RaDeneb);
    };

    Behaves_like<DenebRightAscension> deneb;

    protected static Bearing UUT;
    static double RaDeneb;
}

[Subject(typeof(Bearing), "sexagesimal")]
internal class when_converting_to_sexagesimal
    {
    Because of = () =>
        {
        RaDeneb = 20.6999491773451;
        UUT = new Bearing(RaDeneb);
        };

    Behaves_like<DenebRightAscension> deneb;

    protected static Bearing UUT;
    static double RaDeneb;
    }

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