Programa De Recuento De Palabras Para Archivo De Texto En C#

using System;
using System.IO;
using System.Text.RegularExpressions;

class WordCountProgram
{
    // Main method that starts the word counting program
    static void Main(string[] args)
    {
        // Ask the user for the name of the text file
        Console.WriteLine("Please enter the name of the text file to count words:");

        // Read the name of the text file from the user
        string fileName = Console.ReadLine();

        try
        {
            // Open the file for reading using StreamReader
            using (StreamReader reader = new StreamReader(fileName))
            {
                // Read the entire content of the file
                string content = reader.ReadToEnd();

                // Use a regular expression to match words
                // A word is defined as any sequence of letters, numbers, or underscores
                string pattern = @"\b\w+\b";
                MatchCollection matches = Regex.Matches(content, pattern);

                // The number of words is the number of matches found by the regex
                int wordCount = matches.Count;

                // Display the total word count to the user
                Console.WriteLine($"The file contains {wordCount} words.");
            }
        }
        catch (FileNotFoundException)
        {
            // If the file is not found, show an error message
            Console.WriteLine("Error: The specified file could not be found.");
        }
        catch (Exception ex)
        {
            // Handle any other unexpected errors
            Console.WriteLine("An error occurred: " + ex.Message);
        }
    }
}

 Output

//If the input file example.txt contains the following text:
Hello, this is a simple text file. It contains several words.

//The output will be:
The file contains 8 words.