using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @/
#[-_a-zA-Z][_a-zA-Z0-9-]*(?=[^}]*\{)
/;
string input = @"#foo-bar {
color: #f00;
}
#bar .foo {
font-weight: bold;
}
.baz #bar {
display: block;
}
.foo {
color: #f00; // Yikes!
.bar {
color: blue;
}
}";
foreach (Match m in Regex.Matches(input, pattern))
{
Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index);
}
}
}
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