using System;

​

public class User

{

    public string Name { get; set; }

    public string Email { get; set; }

    public string Address { get; set; }

​

    public User(string name, string email, string address)

    {

        Name = name;

        Email = email;

        Address = address;

    }

​

    public void UpdateProfile(string newName, string newEmail, string newAddress)

    {

        Name = newName;

        Email = newEmail;

        Address = newAddress;

        Console.WriteLine("Profile updated");

    }

​

    public void SendEmail(string subject, string message)

    {

        Console.WriteLine($"Sending email to {Email} with subject: {subject} and message: {message}");

    }

​

    public void SaveToDb()

    {

        // Simulating saving to DB

        Console.WriteLine($"Saving user {Name} to the database");

    }

​

    public void LogActivity(string action)

    {

        Console.WriteLine($"User activity: {action}");

    }

}

​

class Program

{

    static void Main()

    {

        User user = new User("John Doe", "john@example.com", "123 Main St");

        user.UpdateProfile("John Doe", "john@newdomain.com", "456 Elm St");

        user.SendEmail("Welcome", "Welcome to our service");

        user.SaveToDb();

        user.LogActivity("Updated profile");

    }

}

​