I've recompiled an existing .NET 1.1 application with VS.NET 2005 on .NET 2.0. No compile errors, but at run time I get

Cannot perform '>=' operation on System.String and System.DateTime
The line of code referenced is
dtNews.DefaultView.RowFilter = "NewsDate >= #" + DateTime.Today.ToString() + "#";

NewDate is a field from an XML file as follows:

<?xml version="1.0" encoding="utf-8" ?>
<News>
<NewsItem>
    <NewsDate>26/07/2005</NewsDate>
    <Message>***WebECP will be down tonight from 9pm-10pm for enhancements***</Message>
  </NewsItem>
  <NewsItem>
    <NewsDate>15/10/2005</NewsDate>
    <Message>Clinical customers can now be given access to a screen which lists of all devices in their area currently being inspected or repaired. Site WebECP contacts, please contact Evan for implementation details and issues.</Message>
  </NewsItem>
</News>