Writes an attribute string to the specified HtmlTextWriter. The string is initially encoded into the id atttribute and to conform to XHTML standards, and is then decoded on the client and applied as an attribute to the corresponding element. Note: If not DesignMode, then before call to that method owner of this RunBot should call InitializeXAttributes() before every Render.
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