The Program in C# Program that takes letters & display them in reverse order in Given array is given below:

using System;

namespace ReverseLetters
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello Codeauri Family, enter a word here to find it in reverse order:");
            string word = Console.ReadLine();
            char[] wordArray = word.ToCharArray();
            Array.Reverse(wordArray);
            Console.WriteLine("Okay,the word in reverse order is: ");
            Console.WriteLine(new string(wordArray));
        }
    }
}

Output:

Hello Codeauri Family, enter a word here to find it in reverse order:coderecode
Okay,the word in reverse order is:
edoceredoc

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Here are the step by step execution of above program:

1. The using System; statement is a directive that tells the compiler to include the System namespace in the program.
2. The namespace ReverseLetters defines a namespace that encapsulates the Program class.
3. The class Program contains a Main method, which is the entry point of the application.
4. The Main method starts by displaying a message asking the user to enter a word.
5. The user’s input is stored in a string variable called “word”.
6. The ToCharArray() method is used to convert the string into a character array.
7. The Array.Reverse() method is used to reverse the order of the elements in the character array.
8. The new string() constructor is used to create a new string from the reversed character array.
9. Finally, the reversed word is displayed to the user using Console.WriteLine().