C#: Removing common invalid characters from a string: improve this algorithm

Question

Consider the requirement to strip invalid characters from a string. The characters just need to be removed and replace with blank or string.Empty.

char[] BAD_CHARS = new char[] { '!', '@', '#', '$', '%', '_' }; //simple example

foreach (char bad in BAD_CHARS)
{
    if (someString.Contains(bad))
      someString = someString.Replace(bad.ToString(), string.Empty);
}

I'd have really liked to do this:

if (BAD_CHARS.Any(bc => someString.Contains(bc)))
    someString.Replace(bc,string.Empty); // bc is out of scope

Question: Do you have any suggestions on refactoring this algoritm, or any simpler, easier to read, performant, maintainable algorithms?

Answer 1

I don't know about the readability of it, but a regular expression could do what you need it to:

someString = Regex.Replace(someString, @"[!@#$%_]", "");