Regular Expression to replace non alpha characters with spaces

Question

I have been trying to build a regular expression but haven\'t been able to get one specific condition to work.

I want a regex to remove all non alpha characters with the

Answer 1

Here is what I came up with (\s-|[^A-Za-z0-9-])... It will remove all non alphanumerics but keep the "-" except if there is a space before it " -"

Test using sed in Linux, at the moment I don't have access to VS or Mono to test in C#

echo "TEST-TEST -TEST#TEST.TEST -1234" | sed 's/\(\s-\|[^A-Za-z0-9-]\)/ /g'

Output

TEST-TEST TEST TEST TEST 1234

• () and | are used for the OR condition
• We first remove all " -" using \s-
• next we keep all alphanumerics and "-" with [^A-Za-z0-9-]