hello

I ran into a problem with NHibernate - "LastUpdate" field of my class defaults to null (NULL is declared in database table schema as well) but when inserted into NHibernate I got error:
Code:
+      [System.Data.SqlTypes.SqlTypeException]   {"SqlDateTime overflow. Must be between 1/1/1753 12:00:00 AM and 12/31/9999 11:59:59 PM."}   System.Data.SqlTypes.SqlTypeException
I want to avoid hardcoding "NULL" to 1JAN1753 - any alternatives? Thanks