MockRepository mocks = new MockRepository();ISongBird maleBird = (ISongBird)mocks.StrictMock(typeof(ISongBird)),    femaleBird = (ISongBird)mocks.StrictMock(typeof(ISongBird));using (mocks.Ordered()){    maleBird.Eat("seeds", 250);    femaleBird.Eat("seeds", 250);}using (mocks.Ordered()){    maleBird.Mate(femaleBird);    femaleBird.Mate(maleBird);}mocks.ReplayAll();maleBird.Mate(femaleBird);femaleBird.Mate(maleBird);maleBird.Eat("seeds", 250);femaleBird.Eat("seeds", 250);mocks.VerifyAll();