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

        public void TestExceptionIfSchemaChanges()
        {
            DataTable table = new DataTable();
            table.Columns.Add("col1");
            DataTableReader rdr = table.CreateDataReader();
            Assert.Equal(1, rdr.GetSchemaTable().Rows.Count);

            table.Columns[0].ColumnName = "newcol1";
            try
            {
                rdr.GetSchemaTable();
                Assert.False(true);
            }
            catch (InvalidOperationException)
            {
                // Never premise English.
                //Assert.Equal ("Schema of current DataTable '" + table.TableName + 
                //		"' in DataTableReader has changed, DataTableReader is invalid.", e.Message, "#1");
            }

            rdr = table.CreateDataReader();
            rdr.GetSchemaTable(); //no exception
            table.Columns.Add("col2");
            try
            {
                rdr.GetSchemaTable();
                Assert.False(true);
            }
            catch (InvalidOperationException)
            {
                // Never premise English.
                //Assert.Equal ("Schema of current DataTable '" + table.TableName + 
                //		"' in DataTableReader has changed, DataTableReader is invalid.", e.Message, "#1");
            }
        }