Hello Everyone.

I am working on a .NET 3.5 project that needs a regex for date range.  I have tried using Expresso and have searched http://regexlib.com/ but have come up empty handed.

the regex needs to be able to accept the following input (yyyy - yyyy) AND (yyyy) can can not accept years earlier than 1900 or later than 3000 (needs to cap somewhere)

here are some examples of some valid entries
1999 - 2000
1980 - 1981
2008

here are some examples of invalid entries
1800 - 1801
asdf
12345

Thank you so much for the help.