In the previous versions, the Radio button could remain unchecked even in a group, however with the new Api, this doesn’t seem to be the case, My program requires the user to make the initial selection, how can this be achieved.
Maybe this is what you are looking for:
DesktopRadioGroup.SelectedIndex = -1
Note you can also create RadioButton without getting the RadioGroup thing.
There is no Toolbar item for it though (as stupid as that sounds then that’s how it is).
To make RadioButton you drag onto the Window DesktopCheckBox for example and then change its Super to DesktopRadioButton