C# Regular Expression to validate a date?

Question

I am trying to validate a date entered into a text box. There is an input mask on the textbox which forces input of xx/xx/xxxx. I am trying to use a regular expression valid

Answer 1

Why not use one of the methods available in the System.DateTime namespace? You could use DateTime.TryParse() (edit: DateTime.TryParseExact() is probably the right suggestion) to accomplish the validation.