Asp.net – What's the breakdown of the following regex?
^((?!ca-ct.mydomain)(?!ca.mydomain)(?!cats.mydomain).)*mydomain.com$ I got the above expression from a web.config file, it's supposed to filter out anything that contains ca-ct.mydomain or ca.mydomain or cats.mydomain I just cannot understand what the .)* piece means, the closing parenthesis between the dot and the…