Question

I want to filter some string which has some wrong letters (non-ASCII). It looks different in Notepad, Visual Studio 2010 and MySQL.

How can I check if a string has non-ASCII letters and how I can remove them?

Answer 1

You could use a regular expression to filter non ASCII characters:

string input = "AB £ CD";
string result = Regex.Replace(input, "[^\x0d\x0a\x20-\x7e\t]", "");