Wrong Css input hangs the CssCommentRegex.Replace

[horch004]

File: CssParser.cs
Line: 122
Content: string temp = CssCommentRegex.Replace(s, "");

Wrongly formated css somehow hangs up the CssCommentRegex Replace method.
We had someone who linked to a css file which was actually a renamed photoshop file. We don't know what made the Regex hang / stop responding.

We changed the line with the following:

var ts = TimeSpan.FromSeconds(4);
string temp = Regex.Replace(s, @"(?:/\*(.|[\r\n])*?\*/)|(?:(?<!url\s*\([^)]*)//.*)", "", RegexOptions.Compiled, ts);

(added to the top of the file: using System;)

Another approach to safelly MoveCssInline is to run using Task.Run with a timeout.