protected ColumnStrategy()
		{
			_dataAccessProvider = new DataAccessProviderFactory(Server.ProviderType);
			_connection = _dataAccessProvider.CreateConnection(Server.ConnectionString);
			_columns = new ColumnCollection();
			_keys = new KeyCollection();
		}
 protected ColumnStrategy()
 {
     _dataAccessProvider = new DataAccessProviderFactory(Server.ProviderType);
     _connection         = _dataAccessProvider.CreateConnection(Server.ConnectionString);
     _columns            = new ColumnCollection();
     _keys = new KeyCollection();
 }