using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
public class Test
{
public static void Main()
{
var searchTerm = "text";
var textToFormat = "This is some Text: <a href='/text.html'><img src='/images/text.png'/></a>";
var regex = new Regex($@"(<(?:img|a)(?:\s[^>]*>)?)|{Regex.Escape(searchTerm)}", RegexOptions.IgnoreCase);
var highlightedText = regex.Replace(textToFormat, m =>
m.Groups[1].Success ? m.Groups[1].Value : $"<span class='highlight'>{m.Value}</span>");
Console.WriteLine(highlightedText);
}
}
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