public void AddTwoNumbers(int number1, int number2, int expectedResult)
        {
            //Arrange
            AddTwoIntNumbers library = new AddTwoIntNumbers()
            {
                Number1 = number1,
                Number2 = number2,
            };

            //Act
            int result = library.Add();

            //Assert
            Assert.Equal(expectedResult, result);
        }
        public async Task AddTwoNumbersAsync(int number1, int number2, int expectedResult)
        {
            //Arrange
            AddTwoIntNumbers library = new AddTwoIntNumbers()
            {
                Number1 = number1,
                Number2 = number2,
            };

            //Act
            int result = await library.AddAsync();

            //Assert
            Assert.Equal(expectedResult, result);
        }
        public void Add1Plus2ShouldBe3Refactored()
        {
            //Arrange
            AddTwoIntNumbers library = new AddTwoIntNumbers()
            {
                Number1 = 1,
                Number2 = 2,
            };

            //Act
            int result = library.Add();

            //Assert
            Assert.Equal(3, result);
        }