Convert.ToDateTime(D) compared to (DateTime)D

Question

If I have a value D and want to ensure it is type datetime then is there a difference between the following?

1. DateTime dtm = Convert.ToDateTi

Answer 1

Convert.ToDateTime has several overloads that will convert other types to DateTime. It should be used when you're converting an instance that isn't a DateTime to a DateTime instance. You could also use DateTime.Parse and DateTime.TryParse (if you're trying to parse a string representation).

(DateTime)D attempts to directly cast an instance to DateTime. If the instance isn't already a DateTime prior to the call, an exception will be thrown.