How to check if a String contains any of some strings

Question

With a String s, to determine if it contains "a" or "b" or "c". Something that is better than checking each individually:

if (s.contains("a")||s.contains("b")||s.contains("c"))

Answer 1

If you are looking for single characters, you can use String.IndexOfAny().

If you want arbitrary strings, then I'm not aware of a .NET method to achieve that "directly", although a regular expression would work.