Replace all special characters except asterisk

[vavc1980]

Hello,

I've been trying to find a way using regex to replace all special characters and spaces in a string but leaving the asterisk there.
Example:
(8.88)***1 234--

result should be:
888***1234

I've been looking on the web (still am) and also trying myself but I just can't find it, what I have removes the asterisk too, which I don't want. Here's what i have (by the way this is being coded in C#)

text = Regex.Replace(t ext, @"[()-. ]", string.Empty);

Maybe it's something really simple, don't get mad at me regex it's really confusing to me, and like I said I've been trying to find the answer but without any success so far.

Thanks.

[vavc1980]

Well, I kept trying and I was able to accomplish my goal, this is how I did it, maybe there is a better, cleaner way, but at least it works. If you have any better suggestions let me know.

text = Regex.Replace(t ext, @"([\s-.()])", string.Empty);