[TestMethod]
        [DeploymentItem("ConsoleApplication5\\XMLFile1.xml")]
        [DataSource("Microsoft.VisualStudio.TestTools.DataSource.XML",
                           "|DataDirectory|\\XMLFile1.xml",
                           "data",
                            DataAccessMethod.Sequential)]
        public void MatrixDeterminant2x2TestWithXML()
        {
            Program target = new Program();
            int[,] a = new int[,] {
            { Convert.ToInt32(TestContext.DataRow["number1"]), Convert.ToInt32(TestContext.DataRow["number2"]) },
            { Convert.ToInt32(TestContext.DataRow["number3"]), Convert.ToInt32(TestContext.DataRow["number4"]) }
            };
            int expected = Convert.ToInt32(TestContext.DataRow["wynik"]);
            int actual;
            actual = target.MatrixDeterminant2x2(a);
            Assert.AreEqual(actual, expected);
        }