using System;
using System.Text.RegularExpressions;
public class Example
{
public static void Main()
{
string pattern = @"\|\|\K(\d+)(?=\|\|[\s\S]+#\1(\d+))|(?:\r?\n#.*)+$";
string substitution = @"$1$2";
string input = @"||0011||
||0011||
||0011||
||0011||
||0011||
||0011||
||0011||
||0011||
||0011||
||0122||
||0122||
||0122||
||0122||
||0122||
||0122||
||0122||
||0122||
||0122||
||0122||
||0232||
||0232||
||0232||
||0232||
||0232||
||0232||
||0232||
||0232||
||0232||
||0232||
||0232||
#001112
#012234
#023213";
Regex regex = new Regex(pattern);
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