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

        public void LoadDataException()
        {
            DataTable table = new DataTable();
            DataColumn col = new DataColumn();
            col.ColumnName = "Id";
            col.DataType = typeof(int);
            col.DefaultValue = 47;
            table.Columns.Add(col);
            UniqueConstraint uc = new UniqueConstraint("UK1", table.Columns[0]);
            table.Constraints.Add(uc);

            col = new DataColumn();
            col.ColumnName = "Name";
            col.DataType = typeof(string);
            col.DefaultValue = "Hello";
            table.Columns.Add(col);

            table.BeginLoadData();
            object[] row = { 147, "Abc" };
            DataRow newRow = table.LoadDataRow(row, true);

            object[] row1 = { 147, "Efg" };
            DataRow newRow1 = table.LoadDataRow(row1, true);

            object[] row2 = { 143, "Hij" };
            DataRow newRow2 = table.LoadDataRow(row2, true);

            try
            {
                table.EndLoadData();
                Assert.False(true);
            }
            catch (ConstraintException)
            {
            }
        }