Note that reading merge tags can take additional time. If you don't need to work with merge tags, it's better to disable their reading by setting the MergeFieldsDetectionBehavior connection string parameter to MergeFieldsDetectionBehavior.None. You can find more information in the Working with ListMembers Merge Tags topic.
Requirements
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2