title: NHibernate Criteria: concatenating two columns with an IN Expression
body: <p>This is the SQL that I want to accomplish:</p>
  
  <pre><code>WHERE domain_nm + '\' + group_nm in ('DOMAINNAME\USERNAME1','DOMAINNAME2\USERNAME2') 
  </code></pre>
  
  <p>I can't for the life of me find an appropriate Expression for this. And I don't think I can use two expressions as the domain name and the group name need to be concatenated.</p>
  
  <p>Thanks!</p>