'Declaration Public Property AllCurrentFieldsVisible As Nullable(Of Boolean)
public Nullable<bool> AllCurrentFieldsVisible {get; set;}
AllCurrentFieldsVisible property returns True if all the fields currently displayed in the FieldChooser are visible in the data presenter, False if all current fields are hidden in the data presenter, and Null some fields are hidden and some are visible. It's used in the control template to provide the capability of being able to toggle visibility of all fields.
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