Revert VS 2005 DataSet.GetXML() DateTime Format back to VS 2003 Format?

[samtilden]

We have upgraded our web project to Visual Studio 2005 (from VS 2003)
and are still interfacing with some legacy ASP code that we do not want
to change.

The problem is that the VS 2003 compiler used to serialize a DateTime
as:

2006-06-07T15:00:00.0000000-04:00

Now, VS 2005 compiler is serializing a DateTime as:

2006-06-07T15:00:00-04:00
How can I tell Visual Studio 2005 to serialize the DateTime the old way?