using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"\b\sdark:[\w\-:]*\b";
string input = @"<template>
<section class=""bg-gray-50 dark:bg-gray-900"">
<div class=""flex flex-col items-center justify-center px-6 py-8 mx-auto md:h-screen lg:py-0"">
<a href=""#"" class=""flex items-center mb-6 text-2xl font-semibold text-gray-900 dark:text-white"">
<img class=""w-8 h-8 mr-2"" src=""https://flowbite.s3.amazonaws.com/blocks/marketing-ui/logo.svg"" alt=""logo"">
Flowbite
</a>
<div class=""w-full bg-white rounded-lg shadow dark:border md:mt-0 sm:max-w-md xl:p-0 dark:bg-gray-800 dark:border-gray-700"">
<div class=""p-6 space-y-4 md:space-y-6 sm:p-8"">
<h1 class=""text-xl font-bold leading-tight tracking-tight text-gray-900 md:text-2xl dark:text-white"">
Create and account
</h1>
<form class=""space-y-4 md:space-y-6"" action=""#"">
<div>
<label for=""email"" class=""block mb-2 text-sm font-medium text-gray-900 dark:text-white"">Your email</label>
<input type=""email"" name=""email"" id=""email"" class=""bg-gray-50 border border-gray-300 text-gray-900 sm:text-sm rounded-lg focus:ring-primary-600 focus:border-primary-600 block w-full p-2.5 dark:bg-gray-700 dark:border-gray-600 dark:placeholder-gray-400 dark:text-white dark:focus:ring-blue-500 dark:focus:border-blue-500"" placeholder=""name@company.com"" required="">
</div>
<div>
<label for=""password"" class=""block mb-2 text-sm font-medium text-gray-900 dark:text-white"">Password</label>
<input type=""password"" name=""password"" id=""password"" placeholder=""••••••••"" class=""bg-gray-50 border border-gray-300 text-gray-900 sm:text-sm rounded-lg focus:ring-primary-600 focus:border-primary-600 block w-full p-2.5 dark:bg-gray-700 dark:border-gray-600 dark:placeholder-gray-400 dark:text-white dark:focus:ring-blue-500 dark:focus:border-blue-500"" required="">
</div>
<div>
<label for=""confirm-password"" class=""block mb-2 text-sm font-medium text-gray-900 dark:text-white"">Confirm password</label>
<input type=""confirm-password"" name=""confirm-password"" id=""confirm-password"" placeholder=""••••••••"" class=""bg-gray-50 border border-gray-300 text-gray-900 sm:text-sm rounded-lg focus:ring-primary-600 focus:border-primary-600 block w-full p-2.5 dark:bg-gray-700 dark:border-gray-600 dark:placeholder-gray-400 dark:text-white dark:focus:ring-blue-500 dark:focus:border-blue-500"" required="">
</div>
<div class=""flex items-start"">
<div class=""flex items-center h-5"">
<input id=""terms"" aria-describedby=""terms"" type=""checkbox"" class=""w-4 h-4 border border-gray-300 rounded bg-gray-50 focus:ring-3 focus:ring-primary-300 dark:bg-gray-700 dark:border-gray-600 dark:focus:ring-primary-600 dark:ring-offset-gray-800"" required="">
</div>
<div class=""ml-3 text-sm"">
<label for=""terms"" class=""font-light text-gray-500 dark:text-gray-300"">I accept the <a class=""font-medium text-primary-600 hover:underline dark:text-primary-500"" href=""#"">Terms and Conditions</a></label>
</div>
</div>
<button type=""submit"" class=""w-full text-white bg-primary-600 hover:bg-primary-700 focus:ring-4 focus:outline-none focus:ring-primary-300 font-medium rounded-lg text-sm px-5 py-2.5 text-center dark:bg-primary-600 dark:hover:bg-primary-700 dark:focus:ring-primary-800"">Create an account</button>
<p class=""text-sm font-light text-gray-500 dark:text-gray-400"">
Already have an account? <a href=""#"" class=""font-medium text-primary-600 hover:underline dark:text-primary-500"">Login here</a>
</p>
</form>
</div>
</div>
</div>
</section>
</template>
";
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