using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"#(?![\da-f]{6}|[\da-f]{3}).{0,7}";
string input = @"html{
color: #e1e1e;
background-color: #1e1e1e;
}
body{
color: #55432c;
background-color: #53e;
}
div{
color: #55h32c;
}";
RegexOptions options = RegexOptions.Multiline;
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