using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"\b\w+\s*='((?=http://www\.website\.com)[^']+)'";
string substitution = @"""$1""";
string input = @"<img src='http://www.website.com/images/icons/main_icon.png' width='100' scalefit='1'>
<a href='http://www.website.com/page.php?variable1=a&variable2=b'>Click Here</a>
<form action='http://www.website.com/action.php?action=$action_type' method='post'>
<a href='http://example.net' title='WAAHT?''>HEI</a>";
RegexOptions options = RegexOptions.Singleline;
Regex regex = new Regex(pattern, options);
string result = regex.Replace(input, substitution);
}
}
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