C#

protected virtual void btnDate_Click(object sender, EventArgs e)
        {
            MessageBox.Show("Base");
        }

protected override void btnDate_Click(object sender, EventArgs e)
        {
           MessageBox.Show("Child");
        };

ignrod wrote:

but this behavior of the static keyword corresponds to C++ and not C#.

class ClickCount {
	
	static void Main() {
		ClickCount click = new ClickCount();
		click.IncreaseClickCountByOne();
		click.IncreaseClickCountByOne();
		click.IncreaseClickCountByOne();
	}
	
	void IncreaseClickCountByOne() {
		static int clickCount = 1;
		clickCount = clickCount + 1;
		Console.WriteLine(clickCount);
	}
}

class ClickCount {
	
	static int clickCount = 1;
	
	static void Main() {
		ClickCount click = new ClickCount();
		click.IncreaseClickCountByOne();
		click.IncreaseClickCountByOne();
		click.IncreaseClickCountByOne();
	}
	
	void IncreaseClickCountByOne() {
		clickCount = clickCount + 1;
		Console.WriteLine(clickCount);
	}
}

class ClickCount {
	
	int clickCount = 1;
	
	static void Main() {
		ClickCount click = new ClickCount();
		click.IncreaseClickCountByOne();
		click.IncreaseClickCountByOne();
		click.IncreaseClickCountByOne();
	}
	
	void IncreaseClickCountByOne() {
		clickCount = clickCount + 1;
		Console.WriteLine(clickCount);
	}
}

Luc Pattyn wrote:

I am puzzled as to why you want it to be static at all

SomeButton.Tag = stateValue;

int myState=(int)myControl.Tag;

using System;
using System.Drawing;
using System.Windows.Forms;

class CountClickButton : Button {
	
	int clickCount; // Number of clicks
	
	public CountClickButton() {
		clickCount = 0;
	}
	
	// OnClick is called when the button is clicked. It must increase clickCount by one
	// and then execute the event handlers (which is done when base.OnClick
	// is executed).
	protected override void OnClick(EventArgs e) {
		clickCount = clickCount + 1;
		base.OnClick(e);
	}
	
	// Only allow other classes to read number of clicks. Number of clicks cannot be
	// modified by other classes.
	public int ClickCount {
		get {
			return clickCount;
		}
	}
}

class CountClickForm : Form {
	
	CountClickButton b;
	
	public CountClickForm() {
		b = new CountClickButton();
		b.Text = "Click me!";
		b.Size = b.PreferredSize;
		ClientSize = new Size(700, 400); // Should be big enough. Fit to your own needs.
		b.Left = (ClientSize.Width - b.Width) / 2;
		b.Top = (ClientSize.Height - b.Height) / 2;
		b.Click += new EventHandler(b_clicked);
		Controls.Add(b);
		Text = "I count clicks!";
	}
	
	// b_clicked is registered as an event. It will be executed when button is clicked,
	// after number of clicks is increased by one.
	void b_clicked(object sender, EventArgs e) {
		string text = String.Format("Button has been clicked {0} times.", b.ClickCount);
		if (b.ClickCount < 1) { 
			// This should never happen.
			text = "Sorry, I was drunk when programming this. Cheers!!";
		}
		if (b.ClickCount == 1) {
			text = "Button has been clicked once.";
		}
		if (b.ClickCount == 2) {
			text = "Button has been clicked twice.";
		}
		Text = text;
	}
		
	[STAThreadAttribute]
	static void Main() {
		Application.Run(new CountClickForm());
	}
}