Null out parameters in C#?

Question

After reading on stackoverflow that in the case of checking the format of a DateTime you should use DateTime.TryParse. After trying some regex expressions they seem to get l

Answer 1

If you are using .NET 3 and above, you could always create an Extension method?

public static bool IsValidDate(this string value)
{
  DateTime date = DateTime.Null;
  return DateTime.TryParse(value, out date);
}

[Edited to rename the method name to a more appropriate one]