Question

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

Answer 1

using System;

public class ReplaceTheLastOccurrence_CSharp
{
	public static string replaceTheLastOccurrenceOfACharacterInAString(string str, char charToReplace, char replacementChar)
	{
		int pos = str.LastIndexOf(charToReplace);

		if (pos != -1) {
			str = str.Substring(0, pos) + replacementChar + str.Substring(pos + 1);
		}

		return str;
	}

	public static void Main(string[] args)
	{
		string str = "c++ c python c++ java c# php";
		char charToReplace = 'c';
		char replacementChar = 'W';

		str = replaceTheLastOccurrenceOfACharacterInAString(str, charToReplace, replacementChar);

		Console.WriteLine(str);
	}
}



/*
run:

c++ c python c++ java W# php

*/

 

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