Curiously Recurring Template Pattern (CRTP), (Generic, TDD, Fixture, SUT)

CRTP.cs

//Curiously Recurring Template Pattern (CRTP)
//http://zpbappi.com/curiously-recurring-template-pattern-in-csharp/

public interface IFixture<out TFixture, out TSut>
    where TFixture : IFixture<TFixture, TSut>
    where TSut : class
{
    TFixture Setup();
    TSut CreateSut();
}

public abstract class Fixture<TFixture, TSut> : IFixture<TFixture, TSut>
    where TFixture : Fixture<TFixture, TSut>
    where TSut : class
{
    public virtual TFixture Init()
    {
        return (TFixture) this;
    }

    public abstract TFixture Setup();
    public abstract TSut CreateSut();
}

public class MySut{
    public void DoSomething()
    {
        throw new NotImplementedException();
    }
}

public class MyFixture : Fixture<MyFixture, MySut>
{
    public override MyFixture Setup()
    {
        throw new NotImplementedException();
    }

    public override MySut CreateSut()
    {
        throw new NotImplementedException();
    }
}

public class AnotherFixture : Fixture<MyFixture, MySut>
{
    public override MyFixture Init()
    {
        //Do some thing
        return base.Init();
    }

    public override MyFixture Setup()
    {
        throw new NotImplementedException();
    }

    public override MySut CreateSut()
    {
        throw new NotImplementedException();
    }
}

public class Test
{
    public void TestMethod()
    {
        var fixture = 
            new MyFixture()
            .Init()
            .Setup();

        var sut = fixture.CreateSut();

        sut.DoSomething();
    }
}