新发现:微软提供的SqlHelper中FillDataset方法一个小Bug

FillDataset(SqlConnection connection, CommandType commandType,
 string commandText, DataSet dataSet, string[] tableNames)
当调用此方法，并指定映射表名数组,对应参数tableNames
若元素超过3个，即指定表名超过3个时,从第3个表名开始返回的将是系统默认的表名
而非用户指定的表名(如,指定"header" "detail" "relation"，第3个返回了Table2)

此Bug原因在这里：
private static void FillDataset(SqlConnection connection, SqlTransaction transaction, CommandType commandType,
   string commandText, DataSet dataSet, string[] tableNames,
   params SqlParameter[] commandParameters)
{
...
string tableName = "Table";
     for (int index=0; index < tableNames.Length; index++)
     {
      if( tableNames[index] == null || tableNames[index].Length == 0 ) throw new ArgumentException( "The tableNames parameter must contain a list of tables, a value was provided as null or empty string.", "tableNames" );
      dataAdapter.TableMappings.Add(tableName, tableNames[index]);
 tableName += (index + 1).ToString(); //若超过3个表，则
     tableName会变成Table11,Table111,返回映射表名即为Table2,Table3了
     解决方法即在此句前面加“tableName = "Table";”即可
     }
...
}