How to force creating empty elements for nullable types

Sep 3, 2015 at 12:56 PM
I would like to see an empty node like
<description/>
or
<description></description>
after serialization, but if my description-Property is NULL, the element will not serialized into the XML-file.
What is the correct syntax for my schema?
<xs:element name="Description" type="xs:string" minOccurs="1"/>
does not work.