Try this
DateTime newDate = DateTime.SpecifyKind(oldDate, DateTimeKind.Unspecified);
Coding Best Practices Using DateTime in the .NET Framework
Related links
http://daveonsoftware.blogspot.com/2008/07/wcf-datetime-field-adjusted.html
http://social.msdn.microsoft.com/forums/en-US/wcf/thread/36ae825a-ffc6-4ac3-9981-c82692039d58
hgulyan
2010-06-18 06:41:57