using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"<p>((?:(?!</?blockquote).)*?)</p>(?=(?:(?!</?blockquote).)*</blockquote>)";
string substitution = @"<div>\1</div>";
string input = @"<blockquote>
<p>paragraph 1</p>
</blockquote>
<p>paragraph 1 outside blockquote</p>
<blockquote>
<p>paragraph 2</p>
<p>paragraph 3</p>
</blockquote>
<p>paragraph 2 outside blockquote</p>";
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