using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"(^#+ )[^\[]*?\[\[Wikilink]\][^\n]*?\n([\S\s]*?)(?1)";
string input = @"# Part 1
## Some title 1 [[Wikilink]]
Some
random
content
### Sub title 1
Content
### Sub item 2
Content
## Other title 2
Content
# Part 2
## title
### Sub item [[Wikilink]]
content here
## title
# Part 3 [[Wikilink]]
content";
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