Question

How to replace the last occurrence of a substring in a string with C#

Answer 1

using System;
 
class Program
{
    public static string replace_last_occurrence(string s, string subs, string replace) {
        int pos = s.LastIndexOf(subs);

        if (pos == -1)
           return s;

        s = s.Remove(pos, subs.Length).Insert(pos, replace);
        
        return s;
    }
    static void Main() {
        string s = "c++ c php c# java golang c# nodejs";
 
        s = replace_last_occurrence(s, "c#", "python");

        Console.Write(s);
    }
}
 
 
/*
run:
 
c++ c php c# java golang python nodejs
 
*/

 

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