The context parameter can be used to extract additional information about the environment from which this converter is being invoked. This can be null, so always check. Also, properties on the context object can return null.
Depending on the implementation of the value formatter, it might be possible to pass the returned string back into the value formatter to re-create an instance of the object.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)