Remove a specific character from string

I have an application

namespace Aplikacija1
{
    public class excercise5
    {
        static void Main(string[] args)
        {         
            Console.WriteLine("Enter word :");
            string word = Console.ReadLine();
            Console.WriteLine("Enter the letter :");
            string letter = Console.ReadLine();
            int charPos = word.IndexOf($"{letter}");
            Console.WriteLine(word.Remove(charPos, 1));
        }
    }
} 

so it should remove a letter from the string which is entered.

If I enter word Nikola and letter a the result is Nikol which is correct

But if I enter word Nikala and the letter a the result is Nikla, with no option to remove second a, or choose which a I want to remove

Is there a way to add something to my code to make it work?

>Solution :

You could use the Replace() method and replace it with an empty string:

string wordWithoutLetter = word.Replace(letter, "");
Console.WriteLine(wordWithoutLetter);