Mostrar El Contenido Del Archivo - Ejercicio De Programacion C# Sharp

// Importing necessary namespaces for input/output handling
using System;
using System.IO;

public class Program
{
    public static void Main(string[] args)
    {
        // Declaring a variable to store the file name
        string fileName;

        // Checking if a file name was provided as a command-line argument
        if (args.Length > 0)
        {
            // Assigning the first argument as the file name
            fileName = args[0];
        }
        else
        {
            // Asking the user to enter the file name if no argument was provided
            Console.Write("Enter the file name: ");
            fileName = Console.ReadLine();
        }

        // Trying to open and read the file contents
        try
        {
            // Initializing a StreamReader to read the file's contents
            using (StreamReader reader = new StreamReader(fileName))
            {
                // Reading all lines of the file and displaying them
                string line;
                while ((line = reader.ReadLine()) != null)
                {
                    Console.WriteLine(line);  // Printing each line to the console
                }
            }
        }
        // Catching exceptions if the file cannot be opened or read
        catch (FileNotFoundException)
        {
            Console.WriteLine("Error: File not found.");  // Displaying error if file does not exist
        }
        catch (Exception ex)
        {
            Console.WriteLine("An error occurred: " + ex.Message);  // Displaying any other errors
        }
    }
}

 Salida

Case: 1
Enter the file name: myfile.txt

Hello, World!
This is a test file.
Welcome to C# programming.

Case: 2
Enter the file name: nothing.txt

Error: File not found.