using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(\/\*+ Useless CSS \*+\/)(.|[\r\n])*?END Useless CSS \*\*\*\*\/?";
string substitution = @"";
string input = @"/**** Useless CSS ****/
.my-class{
margin: 12px;
}
/* Several Lines after including other comments **/
/**** END Useless CSS ****/
.other {
padding: 12px;
}
/* Hello */";
RegexOptions options = RegexOptions.Multiline;
Regex regex = new Regex(pattern, options);
string result = regex.Replace(input, substitution);
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx