c# - How to find whether a string contains any of the special characters?

Question

I want to find whether a string contains any of the special characters like !,@,#,$,%,^,&,*,(,)....etc.

How can I do that without looping thorugh all the characters in the string?

Answer 1

Use String.IndexOfAny:

private static readonly char[] SpecialChars = "!@#$%^&*()".ToCharArray();

...

int indexOf = text.IndexOfAny(SpecialChars);
if (indexOf == -1)
{
    // No special chars
}

Of course that will loop internally - but at least you don't have to do it in your code.