if you developing sharepoint application,you will face that the DateTime timestamp parameter on sharepoint is different than what you are used to pass in your .Net Application.
In SharePoint 2007,the TimeStamp has to passed as a string and this is the format of the string:
Take these Notes:
1) Date Part is followed by T Symbol.
2) Time Part is followed by Z Symbol.
and the the rest of the string is easy to get it in your application by using:
By using any string concatenation "+" or use String Builder Class to give better performance.
Hope this helps................