'Declaration Public ReadOnly Property DownlevelLabel As DownlevelLabel
public DownlevelLabel DownlevelLabel {get;}
You have two choices as to what downlevel (non-compatible) browsers see when they load the editor, a DownlevelLabel or a DownlevelTextArea. Use the Label if the user CANNOT continue without a compatible browser. You can use the Label to display a message such as "Please upgrade your browser to IE 5.5+ or Mozilla 1.3+". Use the TextArea if the user can continue with a comaptible browser. In this case, a standard HTML TEXTAREA will be displayed to the user, allowing them to enter plain text.
Target Platforms: Windows 10, Windows 8.1, Windows 8, 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