C#

using System;
 
struct N
{
  public int X;
  public int Y;
 
  public N(int x, int y)
  {
    X = x;
    Y = y;
  }
 
  public override string ToString()
  {
    return "[X=" + X + ", Y=" + Y +"]";
  }
}
 
class Test
{
  static void Main()
  {
    N n1 = new N(2, 2);
    N n2 = new N(-2, 2);
    N n3 = new N();
 
    Console.WriteLine("n1 = " + n1);
    Console.WriteLine("n2 = " + n2);
    Console.WriteLine("n3 = " + n3);
 
    Console.WriteLine("n1.Equals(n1): " + n1.Equals(n1));
    Console.WriteLine("n1.Equals(n2): " + n1.Equals(n2));
  }
}

struct N : IComparable
{
  // ...
 
  int IComparable.CompareTo(object obj)
  {
    if (obj == null) throw new ArgumentNullException("obj");
    if (obj.GetType() != GetType()) throw new ArgumentException();
 
    N n = (N)obj; // This will unbox 'obj' to value type, N.
    if (X == n.X)
    {
      return n.Y - Y;
    }
    else
    {
      return n.X - X;
    }
  }
}

class MyDbService : ServiceBase
{
  // ...
  public override void OnStart(string[] args)
  {
    // Perhaps open the database connection and allow exceptions to be thrown
    // so that the service doesn't enter a started state when its clearly won't
    // do anything in such a case.
 
    // Start your thread of execution.
    Thread t = new Thread(new ThreadStart(UpdateDb));
    t.Name = "Db Updater";
    t.Start();
  }
 
  public override void OnStop()
  {
    // Make sure database connections are closed.
  }
 
  void UpdateDb()
  {
    // Update the database.
  }
}