NHibernate2.1.0版本中使用Oracle資料庫時，在設定檔中需要注意寫上Oracle的版本

    A couple of days ago new version of Nhibernate was released. You can download new version here. 

    And if you migrate to this version and using Oracle database,
    You will get this exception

  Could not load type NHibernate.Dialect.OracleDialect. Possible cause: no assembly name specified

   The reason is, you need specify not OracleDialect, but Oracle8iDialect, Oracle9iDialect, Oracle10gDialect, or OracleLiteDialect instead.
   For example for oracle 10.x version you have to change dialect line in your hibernate.cfg.xml to this line

  <property name="dialect">NHibernate.Dialect.Oracle10gDialect</property>