Question

How to replace numbers with underscore 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#0c#00c#000c#0000";

            Regex invalidChars = new Regex(@"[0-9]", RegexOptions.Compiled | 
                                                     RegexOptions.IgnoreCase);

            s = invalidChars.Replace(s, "_");

            Console.WriteLine(s);
        }
    }
}


/*
run:
    
c#_c#__c#___c#____

*/

 

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