Almacenar Y Leer Datos Personales En Un Archivo Binario En C#

using System;
using System.IO;

class PersonalData
{
    // Fields to store the user's data
    public string Name { get; set; }
    public byte Age { get; set; }
    public int YearOfBirth { get; set; }

    // Method to store the data in a binary file
    public void SaveToFile(string fileName)
    {
        // Create a new FileStream to open the file in write mode
        using (BinaryWriter writer = new BinaryWriter(File.Open(fileName, FileMode.Create)))
        {
            // Write the user's name (string length + actual string)
            writer.Write(Name.Length);  // Write the length of the string
            writer.Write(Name);  // Write the string itself

            // Write the age and year of birth
            writer.Write(Age);
            writer.Write(YearOfBirth);
        }
    }

    // Method to read the data from the binary file and display it
    public static PersonalData ReadFromFile(string fileName)
    {
        // Create a new instance of PersonalData to hold the read values
        PersonalData data = new PersonalData();

        // Open the file in read mode
        using (BinaryReader reader = new BinaryReader(File.Open(fileName, FileMode.Open)))
        {
            // Read the name (first read the length, then the actual string)
            int nameLength = reader.ReadInt32();  // Read the string length
            data.Name = new string(reader.ReadChars(nameLength));  // Read the string

            // Read the age and year of birth
            data.Age = reader.ReadByte();
            data.YearOfBirth = reader.ReadInt32();
        }

        return data;  // Return the PersonalData object with the read values
    }
}

class Program
{
    static void Main()
    {
        // Prompt the user for their name, age, and year of birth
        Console.Write("Enter your name: ");
        string name = Console.ReadLine();

        Console.Write("Enter your age: ");
        byte age = byte.Parse(Console.ReadLine());  // Parse the age as a byte

        Console.Write("Enter your year of birth: ");
        int yearOfBirth = int.Parse(Console.ReadLine());  // Parse the year of birth as an int

        // Create an instance of PersonalData and set the values
        PersonalData userData = new PersonalData
        {
            Name = name,
            Age = age,
            YearOfBirth = yearOfBirth
        };

        // Define the file name to store the data
        string fileName = "personalData.dat";

        // Save the data to the file
        userData.SaveToFile(fileName);

        // Read the data back from the file
        PersonalData readData = PersonalData.ReadFromFile(fileName);

        // Display the read data to the user
        Console.WriteLine("\nData read from file:");
        Console.WriteLine($"Name: {readData.Name}");
        Console.WriteLine($"Age: {readData.Age}");
        Console.WriteLine($"Year of Birth: {readData.YearOfBirth}");
    }
}

 Output

Enter your name: John Doe
Enter your age: 25
Enter your year of birth: 1996

Data read from file:
Name: John Doe
Age: 25
Year of Birth: 1996