FooterStringFormat can be a predefined, composite, or custom string format. For more information see the documentation on the corresponding HeaderFormatString property of the System.Windows.Controls.HeaderedContentControl.
Note:If you are using a version of Microsoft's .Net framework that is before 3.5-SP1 or if you set the FooterTemplate or FooterTemplateSelector property of a ReportPagePresenter, then the FooterStringFormat property is ignored.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, 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