Function to modify a character of a text

Create a C# program that implements a function called ChangeLetter that receives as a parameter a text, a position (based on 0) and a letter requested from the user. You must modify the character of the text and display the new text on the screen.

Input

Card
3
 

Output

Car

Solution

using System;
class FunctionChangeLetter
{
    public static void Main(string[] args)
    {
        string text = Console.ReadLine();
        int position = Convert.ToInt32(Console.ReadLine());
        char letter = Convert.ToChar(Console.ReadLine());

        ChangeLetter(text, position, letter);
    }

    public static string ChangeLetter(string text, int position, char letter)
    {
        text = text.Remove(position, 1);
        text = text.Insert(position, letter.ToString());

        return text;
    }
}