Converting DateTime To SqlDateTime Format

Hi,

I have a function that generates a range of DateTimes, which I then cast to SqlDateTime to compare with SqlDateTime values in a database.

The problem is my converted DateTimes come out in this type of format "6/2/2006 12:00:00 AM"

wheras my SqlDateTimes in the database are in this format "2006-01-18T00:00:00.0000000-12:00"

Any ideas how I can convert the DateTime values to SqlDateTime correctly so that I can compare them?  As I said I tried creating a new SqlDateTime object with the DateTime value ie

DateTime dt = new DateTime("");

SqlDateTime sdt = new SqlDateTime(dt);

But that doesn't work correctly, its still not in the format that is in the database.