The ListSeparator is used to separate the display string of each member of the CheckedItems collection when building the string representation that is displayed by the embeddable editor.
In the absence of an explicit setting, the current culture's list separator, followed by a single space character, is used. This string is appended to all items except for the last one.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, 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