System.Data.Tests.DataTableReaderTest.ClearTest C# (CSharp) Метод

        public void ClearTest()
        {
            DataTableReader reader = null;
            try
            {
                reader = new DataTableReader(_dt);
                reader.Read(); // first row
                reader.Read(); // second row
                _dt.Clear();
                try
                {
                    int i = (int)reader[0];
                    i++; // supress warning
                    Assert.False(true);
                }
                catch (RowNotInTableException) { }

                // clear and add test
                reader.Close();
                reader = new DataTableReader(_dt);
                reader.Read(); // first row
                reader.Read(); // second row
                _dt.Clear();
                _dt.Rows.Add(new object[] { 8, "mono 8" });
                _dt.AcceptChanges();
                bool success = reader.Read();
                Assert.False(success);

                // clear when reader is not read yet
                reader.Close();
                reader = new DataTableReader(_dt);
                _dt.Clear();
                _dt.Rows.Add(new object[] { 8, "mono 8" });
                _dt.AcceptChanges();
                success = reader.Read();
                Assert.True(success);
            }
            finally
            {
                if (reader != null && !reader.IsClosed)
                    reader.Close();
            }
        }