System.Data.Tests.DataTableTest.Select2 C# (CSharp) Метод

        public void Select2()
        {
            DataSet Set = new DataSet();
            DataTable Child = new DataTable("Child");

            Set.Tables.Add(Child);

            DataColumn Col3 = new DataColumn("Name");
            DataColumn Col4 = new DataColumn("Age");
            Col4.DataType = typeof(short);
            Child.Columns.Add(Col3);
            Child.Columns.Add(Col4);

            DataRow Row = Child.NewRow();
            Row[0] = "Nick";
            Row[1] = 15;
            Child.Rows.Add(Row);

            Row = Child.NewRow();
            Row[0] = "Dick";
            Row[1] = 25;
            Child.Rows.Add(Row);

            Row = Child.NewRow();
            Row[0] = "Mick";
            Row[1] = 35;
            Child.Rows.Add(Row);

            Row = Child.NewRow();
            Row[0] = "Jack";
            Row[1] = 10;
            Child.Rows.Add(Row);

            Row = Child.NewRow();
            Row[0] = "Mack";
            Row[1] = 19;
            Child.Rows.Add(Row);

            Row = Child.NewRow();
            Row[0] = "Mack";
            Row[1] = 99;
            Child.Rows.Add(Row);

            DataRow[] Rows = Child.Select("age >= 20", "age DESC");
            Assert.Equal(3, Rows.Length);
            Assert.Equal("Mack", Rows[0][0]);
            Assert.Equal("Mick", Rows[1][0]);
            Assert.Equal("Dick", Rows[2][0]);

            Rows = Child.Select("age >= 20", "age asc");
            Assert.Equal(3, Rows.Length);
            Assert.Equal("Dick", Rows[0][0]);
            Assert.Equal("Mick", Rows[1][0]);
            Assert.Equal("Mack", Rows[2][0]);

            Rows = Child.Select("age >= 20", "name asc");
            Assert.Equal(3, Rows.Length);
            Assert.Equal("Dick", Rows[0][0]);
            Assert.Equal("Mack", Rows[1][0]);
            Assert.Equal("Mick", Rows[2][0]);

            Rows = Child.Select("age >= 20", "name desc");
            Assert.Equal(3, Rows.Length);
            Assert.Equal("Mick", Rows[0][0]);
            Assert.Equal("Mack", Rows[1][0]);
            Assert.Equal("Dick", Rows[2][0]);
        }