Button btn = new Button();
            btn.Name = "btn";
            btn.Click += (sender, e) => MessageBox.Show((sender as Button).Name);

            this.Controls.Add(btn);

------解决方案--------------------

C# code

            Button btn1 = new Button();
            btn1.Text = "测试";
            btn1.Click+=new EventHandler(btn1_Click);
            this.Controls.Add(btn1);
            private void btn1_Click(object sender, EventArgs e)
        {
            Button btn = (Button)sender;
            MessageBox.Show(btn.Name);
        }

------解决方案--------------------
注册事件就行了

------解决方案--------------------
按上面的方法，定义三个不同的btn对象就可以了。