title: How to set null to a GUID property
body: <p>I have an object of type Employee which has a Guid property. I know if I want to set to null I must to define my type property as nullable <code>Nullable&lt;Guid&gt;</code> prop or Guid? prop.</p>
  
  <p>But in my case I'm not able to change the type of the prop, so it will remains as Guid type and my colleague and I we don't want to use the Guid.Empty.</p>
  
  <p>Is there a way to set my property as null or string.empty in order to restablish the field in the database as null.</p>
  
  <p>I have a mechanism to transform from string.empty to null but I will change many things if the would change to accept a empty guid to null.</p>
  
  <p>Any help please!</p>