System.Data.Tests.DataRowTest.ParentRowTest C# (CSharp) Метод

        public void ParentRowTest()
        {
            //Clear all existing values from table
            for (int i = 0; i < _table.Rows.Count; i++)
            {
                _table.Rows[i].Delete();
            }
            _table.AcceptChanges();
            _row = _table.NewRow();
            _row["FName"] = "My FName";
            _row["Id"] = 0;
            _table.Rows.Add(_row);

            DataTable tableC = new DataTable("Child");
            DataColumn colC;
            DataRow rowC;

            colC = new DataColumn();
            colC.DataType = Type.GetType("System.Int32");
            colC.ColumnName = "Id";
            colC.AutoIncrement = true;
            tableC.Columns.Add(colC);


            colC = new DataColumn();
            colC.DataType = Type.GetType("System.String");
            colC.ColumnName = "Name";
            tableC.Columns.Add(colC);

            rowC = tableC.NewRow();
            rowC["Name"] = "My FName";
            tableC.Rows.Add(rowC);
            var ds = new DataSet();
            ds.Tables.Add(_table);
            ds.Tables.Add(tableC);
            DataRelation dr = new DataRelation("PO", _table.Columns["Id"], tableC.Columns["Id"]);
            ds.Relations.Add(dr);

            rowC.SetParentRow(_table.Rows[0], dr);

            Assert.Equal(_table.Rows[0], (tableC.Rows[0]).GetParentRow(dr));
            Assert.Equal(tableC.Rows[0], (_table.Rows[0]).GetChildRows(dr)[0]);

            ds.Relations.Clear();
            dr = new DataRelation("PO", _table.Columns["Id"], tableC.Columns["Id"], false);
            ds.Relations.Add(dr);
            rowC.SetParentRow(_table.Rows[0], dr);
            Assert.Equal(_table.Rows[0], (tableC.Rows[0]).GetParentRow(dr));
            Assert.Equal(tableC.Rows[0], (_table.Rows[0]).GetChildRows(dr)[0]);

            ds.Relations.Clear();
            dr = new DataRelation("PO", _table.Columns["Id"], tableC.Columns["Id"], false);
            tableC.ParentRelations.Add(dr);
            rowC.SetParentRow(_table.Rows[0]);
            Assert.Equal(_table.Rows[0], (tableC.Rows[0]).GetParentRow(dr));
            Assert.Equal(tableC.Rows[0], (_table.Rows[0]).GetChildRows(dr)[0]);
        }