PdfVisualRadioButtonField.RadiosInUnison Property
Gets or sets a value indicating whether all the widgets the same export value in the same radio button group should be selected.
Property Value
If true, a group of radio buttons widgets within a radio button field that use the same export value will turn on and off in unison.
Remarks
If set, a group of radio buttons within a radio button field that use the same export value will turn on and off in unison; that is if one is checked, they are all checked. If clear, the buttons are mutually exclusive.