Convert A Text File To Uppercase - C# Programming Exercise

// Importing the System namespace to access basic operations like Console and File handling
using System;  

// Importing the System.IO namespace to handle file operations
using System.IO;  

// Defining the ConvertToUppercase class
class ConvertToUppercase  
{
    // Method to convert the content of a text file to uppercase
    public static void ConvertFileToUppercase(string inputFileName, string outputFileName)
    {
        // Reading the content of the input file using File.ReadAllText
        string fileContent = File.ReadAllText(inputFileName);

        // Converting the content to uppercase using the ToUpper method
        string uppercasedContent = fileContent.ToUpper();

        // Writing the converted content to the output file using File.WriteAllText
        File.WriteAllText(outputFileName, uppercasedContent);

        // Displaying a message to the user that the file has been successfully written
        Console.WriteLine($"File content has been converted to uppercase and saved to {outputFileName}");
    }

    // Main method where execution starts
    static void Main(string[] args)
    {
        // Asking the user to input the file name for reading
        Console.Write("Enter the input file name (with extension): ");
        
        // Reading the file name from the user input
        string inputFileName = Console.ReadLine();  

        // Creating the output file name by appending "_uppercase" to the original file name
        string outputFileName = Path.GetFileNameWithoutExtension(inputFileName) + "_uppercase" + Path.GetExtension(inputFileName);

        // Calling the method to convert the content of the input file to uppercase and save it to the output file
        ConvertFileToUppercase.ConvertFileToUppercase(inputFileName, outputFileName);
    }
}