Program.cs

using System;
using System.Text.RegularExpressions;

// NameSpace 
namespace NumberGuesser {
    // Main Class 
    class Program {
        // Entry Point Method  
        static void Main(string[] args){

            GetAppInfo(); // Run GetAppInfo function to get info

            GreetUser(); // Ask for users name & Greet

            while(true) {
                // Init correct number 
                // int correctNumber = 7;

                // Create a new Random object 
                Random random = new Random();

                // Init correct number 
                int correctNumber = random.Next(1,11);

                // Init guess var 
                int guess = 0;

                // Ask user for number 
                Console.WriteLine("Guess a number between 1 and 10");

                // While guess is not correct 
                while(guess != correctNumber) {

                    // Get users input 
                    string? input = Console.ReadLine();

                    // Make sure its a number 
                    if(!int.TryParse(input, out guess)) {
                        
                        // Print Error Message 
                        PrintColorMessage(ConsoleColor.Red, "Please use an actual number");

                        // Keep Going 
                        continue;
                    }

                    // Cast to int and put in guess 
                    guess = Int32.Parse(input);

                    // Match guess to correct number 
                    if(guess != correctNumber) {

                        // Print error message 
                        PrintColorMessage(ConsoleColor.Red, "Wrong number, please try again");
                    }
                }

                // Print success message 
                PrintColorMessage(ConsoleColor.Yellow, "CORRECT!! You guessed it!");

                // Ask to play again 
                Console.WriteLine("Play Again? [Y or N]");

                // Get Answer 
                string answer = Console.ReadLine()!.ToUpper();

                if(answer == "Y") {
                    continue;
                }
                else if (answer == "N") {
                    return;
                }
                else {
                    return;
                }
            }
        }

        // Get and display app info 
        static void GetAppInfo() {
            // Set app vars
            string appName = "Number Guesser";
            string appVersion = "1.0.0";
            string appAuthor = "Veepanshu Kasana";

            // Change text color 
            Console.ForegroundColor = ConsoleColor.DarkMagenta;

            // Write out app info 
            Console.WriteLine("{0}: Version {1} by {2}", appName, appVersion, appAuthor);

            // Reset text color 
            Console.ResetColor();
        }

        // Ask users name and greet 
        static void GreetUser() {

            // Ask users name 
            Console.WriteLine("What is your name?");

            // Get users input 
            string? inputName = Console.ReadLine();

            Console.WriteLine("Hello {0}, Let's play a game...", inputName);
        }
        
        // Print Color Message    
        static void PrintColorMessage(ConsoleColor color, string message) {
            // Change text color 
            Console.ForegroundColor = color;

            // Tell user its not a number 
            Console.WriteLine(message);

            // Resets text color 
            Console.ResetColor();
        }
    }
}