📂 C# File I/O Interactive Tutorial

📖 Reading Files

using System;
using System.IO;

class Program
{
    static void Main()
    {
        string filePath = "example.txt";
        try
        {
            using (StreamReader reader = new StreamReader(filePath))
            {
                string content = reader.ReadToEnd();
                Console.WriteLine(content);
            }
        }
        catch (FileNotFoundException ex)
        {
            Console.WriteLine("File not found: " + ex.Message);
        }
    }
}

🔍 Tip: Always wrap file I/O operations in try-catch to handle exceptions like FileNotFoundException.

📝 Writing to Files

using System;
using System.IO;

class Program
{
    static void Main()
    {
        string filePath = "example.txt";
        try
        {
            using (StreamWriter writer = new StreamWriter(filePath))
            {
                writer.WriteLine("Hello, world!");
            }
        }
        catch (IOException ex)
        {
            Console.WriteLine("Error: " + ex.Message);
        }
    }
}

📄 Interactive: Write & Read File

Enter text to save:

📖 File Content:

File content will appear here...

💡 StreamWriter overwrites by default. To append, pass true as the second argument.

🗑️ Deleting Files

using System;
using System.IO;

class Program
{
    static void Main()
    {
        string filePath = "example.txt";
        if (File.Exists(filePath))
        {
            File.Delete(filePath);
            Console.WriteLine("File deleted.");
        }
        else
        {
            Console.WriteLine("File not found.");
        }
    }
}

📂 C# File I/O Interactive Tutorial

📖 Reading Files

📝 Writing to Files

📄 Interactive: Write & Read File

📖 File Content:

🗑️ Deleting Files

🧠 File I/O Quiz