using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.ComponentModel;
class InferenceAndContravariance
{
static void LogPlainEvent(object sender, EventArgs e)
{
Console.WriteLine ("An event occurred");
}
static void Main()
{
Button button = new Button();
button.Text = "Click me";
button.Click += LogPlainEvent;
button.KeyPress += LogPlainEvent;
button.MouseClick += LogPlainEvent;
Form form = new Form();
form.AutoSize = true;
form.Controls.Add(button);
Application.Run(form);
}
}