Question

How to convert lines in a multiline string starting with some "#" to start and end with "_" in C#

Answer 1

using System;
using System.Text.RegularExpressions;

class Program
{
    static void Main()
    {
        string str = "###Word1 Word2\nWord3\nWord4 Word5 Word6\n##Word7\n#Word8 Word9\n";

        // Replace the matches using Regex.Replace
        str = Regex.Replace(str, @"#+(.*)\n", "_$1_\n");

        Console.WriteLine(str);
    }
}

 
/*
run:
     
_Word1 Word2_
Word3
Word4 Word5 Word6
_Word7_
_Word8 Word9_
 
*/

 

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