Question

I am looking for regular expression that evaluates below.

0-9 a-Z A-Z - / '

Answer 1

The C# version of this pattern is:

@"[0-9a-zA-Z/'-]"

Used in code:

var regex = new Regex(@"[0-9a-zA-Z/'-]");

or

var regex = new Regex(@"[0-9a-z/'-]", RegexOptions.IgnoreCase);

Note that the - is at the very end of the character class (the part in the brackets). For - to mean a literal hyphen inside a character class, it must be at the beginning or end of the class (i.e. [-blah] or [blah-]), or escaped with a backslash: [ab\-c] will match a, b, c, or -.

Note also the @ at the beginning of the quoted string. This isn’t important for this pattern, but it’s a good habit to get into with C# regex. Regular expressions often contain backslashes, and the @"..." form will allow you to use backslashes in your pattern without having to escape them.