There's not much difference, you can even see the difference if you decompile the source/lookup the C# reference source online.
The main difference is that is coalesces a
null input to a
new DateTime(0) (i.e.
DateTime.MinValue) which feels a bit wonky to me.
Apart from that the only other difference is that you can't pass
DateTimeStyles like you can with
DateTime.TryParse so the resulting
DateTime will always represent the date in Local time rather than Utc.