How can you strip non-ASCII characters from a string? (in C#)

Question

How can you strip non-ASCII characters from a string? (in C#)

Answer 1

string s = "søme string";
s = Regex.Replace(s, @"[^\u0000-\u007F]+", string.Empty);

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The ^ is the not operator. It tells the regex to find everything that doesn't match, instead of everything that does match. The \u####-\u#### says which characters match.\u0000-\u007F is the equivalent of the first 128 characters in utf-8 or unicode, which are always the ascii characters. So you match every non ascii character (because of the not) and do a replace on everything that matches.

(as explained in a comment by Gordon Tucker Dec 11, 2009 at 21:11)