C# regex to match a string that doesn't contain a certain string?

Question

This should be an easy one for the Regex experts out there... :)

I want to match any string that does not contain the string "DontMatchThis".

What's the regex?

Answer 1

try this:

^(?!.*DontMatchThis).*$

Answer 2

I have similar problem and my pattern match only last entry but i want more :) Idea is capturing xml comments:

<!--(?!.*(<!--)).*-->

Answer 3

Just use !:

! new Regex("DontMatchThis").IsMatch(input)