public void PerimeterTest()
        {
            //Arrange
            RectangleService rectangleService = new RectangleService();

            //Act
            var perimeter = rectangleService.Perimeter(2, 3.5);

            //Assert
            Assert.Equal(11, perimeter);
        }
        public void AreaTest()
        {
            //Arrange
            RectangleService rectangleService = new RectangleService();

            //Act
            var area = rectangleService.Area(2, 3.5);

            //Assert
            Assert.Equal(7.0, area);
        }