// This example demonstrates the use of the ControlAdded and
// ControlRemoved events. This example assumes that two Button controls
// are added to the form and connected to the addControl_Click and
// removeControl_Click event-handler methods.
private void Form1_Load(object sender, System.EventArgs e)
{
    // Connect the ControlRemoved and ControlAdded event handlers
    // to the event-handler methods.
    // ControlRemoved and ControlAdded are not available at design time.
    this.ControlRemoved += new System.Windows.Forms.ControlEventHandler(this.Control_Removed);
    this.ControlAdded += new System.Windows.Forms.ControlEventHandler(this.Control_Added);
}

private void Control_Added(object sender, System.Windows.Forms.ControlEventArgs e)
{
    MessageBox.Show("The control named " + e.Control.Name + " has been added to the form.");
}

private void Control_Removed(object sender, System.Windows.Forms.ControlEventArgs e)
{
    MessageBox.Show("The control named " + e.Control.Name + " has been removed from the form.");
}

// Click event handler for a Button control. Adds a TextBox to the form.
private void addControl_Click(object sender, System.EventArgs e)
{
    // Create a new TextBox control and add it to the form.
    TextBox textBox1 = new TextBox();
    textBox1.Size = new Size(100,10);
    textBox1.Location = new Point(10,10);
    // Name the control in order to remove it later. The name must be specified
    // if a control is added at run time.
    textBox1.Name = "textBox1";

    // Add the control to the form's control collection.
    this.Controls.Add(textBox1);
}

// Click event handler for a Button control.
// Removes the previously added TextBox from the form.
private void removeControl_Click(object sender, System.EventArgs e)
{
    // Loop through all controls in the form's control collection.
    foreach (Control tempCtrl in this.Controls)
    {
        // Determine whether the control is textBox1,
        // and if it is, remove it.
        if (tempCtrl.Name == "textBox1")
        {
            this.Controls.Remove(tempCtrl);
        }
    }
}

//引入命名空间
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

public class Form1 : Form
{
   Label Label1;
   TextBox TextBox1;
   Button Button1;

  public Form1()
  {
        InitializeComponent();
  }
   private void ctrlClick(System.Object sender, EventArgs e)
   {
     Control ctrl = (Control)sender;
     MessageBox.Show("You clicked: " + ctrl.Name);
   }

  private void InitializeComponent()
  {
    this.Label1 = new System.Windows.Forms.Label();
    this.TextBox1 = new System.Windows.Forms.TextBox();
    this.Button1 = new System.Windows.Forms.Button();
    this.SuspendLayout();
    // 
    // Label1
    // 
    this.Label1.FlatStyle = System.Windows.Forms.FlatStyle.System;
    this.Label1.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
    this.Label1.Location = new System.Drawing.Point(14, 97);
    this.Label1.Name = "Label1";
    this.Label1.Size = new System.Drawing.Size(112, 24);
    this.Label1.TabIndex = 8;
    this.Label1.Text = "Label1";
    this.Label1.Click += new System.EventHandler(this.ctrlClick);
    // 
    // TextBox1
    // 
    this.TextBox1.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
    this.TextBox1.Location = new System.Drawing.Point(12, 61);
    this.TextBox1.Name = "TextBox1";
    this.TextBox1.Size = new System.Drawing.Size(156, 21);
    this.TextBox1.TabIndex = 7;
    this.TextBox1.Text = "TextBox1";
    this.TextBox1.Click += new System.EventHandler(this.ctrlClick);
    // 
    // Button1
    // 
    this.Button1.FlatStyle = System.Windows.Forms.FlatStyle.System;
    this.Button1.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
    this.Button1.Location = new System.Drawing.Point(12, 21);
    this.Button1.Name = "Button1";
    this.Button1.Size = new System.Drawing.Size(96, 28);
    this.Button1.TabIndex = 6;
    this.Button1.Text = "Button1";
    this.Button1.Click += new System.EventHandler(this.ctrlClick);
    // 
    // Form1
    // 
    this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
    this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
    this.ClientSize = new System.Drawing.Size(367, 281);
    this.Controls.Add(this.Label1);
    this.Controls.Add(this.TextBox1);
    this.Controls.Add(this.Button1);
    this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
    this.Name = "Form1";
    this.Text = "Control Medley";
    this.ResumeLayout(false);
    this.PerformLayout();

  }


  [STAThread]
  static void Main()
  {
    Application.EnableVisualStyles();
    Application.Run(new Form1());
  }

}