System.Data.Tests.DataColumnCollectionTest2.Remove C# (CSharp) Метод

        public void Remove()
        {
            //prepare a DataSet with DataTable to be checked
            DataTable dtSource = new DataTable();
            dtSource.Columns.Add("Col_0", typeof(int));
            dtSource.Columns.Add("Col_1", typeof(int));
            dtSource.Columns.Add("Col_2", typeof(int));
            dtSource.Rows.Add(new object[] { 0, 1, 2 });

            DataTable dt = null;

            //------Check Remove first column---------
            dt = dtSource.Clone();
            dt.ImportRow(dtSource.Rows[0]);

            dt.Columns.Remove(dt.Columns[0].ColumnName);
            Assert.Equal(2, dt.Columns.Count);
            Assert.Equal(false, dt.Columns.Contains("Col_0"));
            Assert.Equal(1, dt.Rows[0][0]);
            Assert.Equal(2, dt.Rows[0][1]);



            //------Check Remove middle column---------
            dt = dtSource.Clone();
            dt.ImportRow(dtSource.Rows[0]);

            dt.Columns.Remove(dt.Columns[1].ColumnName);
            Assert.Equal(2, dt.Columns.Count);
            Assert.Equal(false, dt.Columns.Contains("Col_1"));
            Assert.Equal(0, dt.Rows[0][0]);
            Assert.Equal(2, dt.Rows[0][1]);


            //------Check Remove last column---------
            dt = dtSource.Clone();
            dt.ImportRow(dtSource.Rows[0]);

            dt.Columns.Remove(dt.Columns[2].ColumnName);

            Assert.Equal(2, dt.Columns.Count);
            Assert.Equal(false, dt.Columns.Contains("Col_2"));
            Assert.Equal(0, dt.Rows[0][0]);
            Assert.Equal(1, dt.Rows[0][1]);


            //------Check Remove column exception---------
            dt = dtSource.Clone();
            dt.ImportRow(dtSource.Rows[0]);

            Assert.Throws<ArgumentException>(() =>
            {
                dt.Columns.Remove("NotExist");
            });

            dt.Columns.Clear();

            Assert.Throws<ArgumentException>(() =>
            {
                dt.Columns.Remove("Col_0");
            });
        }