using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(?P<Hex>(?<=.[^}{])#(?:[\dA-F]{6}|[\dA-F]{3})(?=\W[^}{]))+";
string input = @"#BED
{
color: #FfFdF8; background-color:#aef;
font-size: 123px;
background: -webkit-linear-gradient(top, #f9f9f9, #fff);
}
#Cab
{
background-color: #ABC;
border: 2px dashed #fff;
}
#dddd
Valid Hex Color Codes
#FFF
#025
#F0A1FB
Invalid Hex Color Codes
#fffabg
#abcf
#12365erff
#BED{ color: #FfFdF8; background-color:#aef; font-size: 123px;}#Cab{ background-color: #ABC; border: 2px dashed #fff;}
";
RegexOptions options = RegexOptions.IgnoreCase;
foreach (Match m in Regex.Matches(input, pattern, options))
{
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