Question

How to add square brackets to underscores in a string with C#

Answer 1

using System;
using System.Text.RegularExpressions;

namespace ConsoleApplication_C_Sharp
{
    class Program
    {
        static void Main(string[] args)
        {
            var s = "c#_c__c++___________java";

            s = Regex.Replace(s, "[_]", "[$&]");

            Console.WriteLine(s);
        }
    }
}


/*
run:
    
c#[_]c[_][_]c++[_][_][_][_][_][_][_][_][_][_][_]java

*/

 

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Answer 2

using System;
using System.Text.RegularExpressions;

namespace ConsoleApplication_C_Sharp
{
    class Program
    {
        static void Main(string[] args)
        {
            var s = "c#_c__c++___________java";

            s = Regex.Replace(s, "[_]+", "[$&]");

            Console.WriteLine(s);
        }
    }
}


/*
run:
    
c#[_]c[__]c++[___________]java

*/

 

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