Modify a letter in a string - Practice Exercises C# Sharp

Lesson 5:

Functions

Exercise 5.14:

Modify a letter in a string

Objetive:

Create a function named "ChangeChar" to modify a letter in a certain position (0 based) of a string, replacing it with a different letter:

string sentence = "Tomato";
ChangeChar(ref sentence, 5, 'a');

using System;
class ChangChar
{
    public static void ChangeChar(ref string text, int position, char letter)
    {
        text = text.Remove(position, 1);
        text = text.Insert(position, letter.ToString());
    }

    public static void Main()
    {
        string sentence = "Tomato";
        ChangeChar(ref sentence, 5, 'a');
    }
}